Document:

<PAGE>   1
                                                                   Exhibit 10.17

                                    GUARANTEE

       In consideration of and as an inducement to financial accommodations made
or to be made by KEYBANK NATIONAL ASSOCIATION ("Lender") to THE KROLL-O'GARA
COMPANY, O'GARA-HESS & EISENHARDT ARMORING COMPANY, KROLL HOLDINGS, INC., and
KROLL ASSOCIATES, INC. (hereinafter individually and collectively referred to as
the "Borrower"), and other good and valuable consideration the receipt of which
is acknowledged, CORPLEX, INC., O'GARA SECURITY INTERNATIONAL, INC., O'GARA
SATELLITE NETWORKS, INC., KROLL ENVIRONMENTAL ENTERPRISES, INC., KROLL
INFORMATION SERVICES, INC., KROLL ASSOCIATES INTERNATIONAL HOLDINGS, INC., KROLL
BACKGROUND AMERICA, INC., KROLL LINDQUIST AVEY, INC., INPHOTO SURVEILLANCE,
INC., KROLL SCHIFF & ASSOCIATES, INC., KROLL LABORATORY SPECIALISTS, INC.,
KROLL-O'GARA CRISIS MANAGEMENT GROUP, INC., ITI LIMITED PARTNERSHIP,
INTERNATIONAL TRAINING, INCORPORATED AND KROLL BUCHLER PHILLIPS, LTD.
(hereinafter individually and collectively referred to as the "Guarantor")
jointly and severally hereby unconditionally guarantees Lender the prompt
payment and performance of the following (hereinafter collectively referred to
as the "Obligations"): all loans, advances, debts, liabilities, obligations,
covenants and duties now or hereafter owing to Lender from Borrower of any kind
or nature, present or future (including any obligations under any interest rate
swap, cap, collar, floor, option, forward, or other type of interest rate
protection, foreign exchange or derivative transaction agreement, including any
other master agreement covering any such transaction), whether or not for the
payment of money, whether arising by reason of an extension of credit, opening
of a letter of credit, loan, guarantee, endorsement, indemnification or in any
other manner, whether direct or indirect (including those acquired by
assignment, participation, purchase, negotiation, discount or otherwise),
absolute or contingent, joint or several, due or to become due, now existing or
hereafter arising and whether or not contemplated by Borrower or Lender on the
Closing Date, including but not limited to all obligations of any kind at any
time arising in connection with the Second Amended and Restated Loan Agreement
dated as of March 30, 2001 between Borrower and Lender (as now or hereafter
amended, extended, renewed, restated or supplemented, the "Loan Agreement"), the
Security Documents now or hereafter existing, all amendments, extensions,
renewals, restatements and supplements thereof, and all principal, interest,
charges, expenses, fees (including Attorneys' Fees), indemnification obligations
and other sums of any kind thereunder or relating thereto.

       Capitalized terms used herein and not otherwise defined herein will have
the meanings given such terms in the Loan Agreement.

       1.     NATURE OF GUARANTEE, WAIVERS.
              ----------------------------

              1.1 This is a guarantee of payment and not of collection. This is
an absolute, unconditional, primary, and continuing obligation and will remain
in full force and effect until the first to occur of the following: (i) all of
the Obligations have been indefeasibly

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paid in full, and Lender has terminated this Guarantee; (ii) 30 days after the
date on which written notice of revocation is actually received by Lender; or
(iii) the date on which written notice of the death of Guarantor is actually
received by Lender. No revocation (whether upon the death of the Guarantor or
otherwise) will affect: (i) the then existing liabilities of the revoking
Guarantor under this Guarantee; (ii) Obligations created, contracted, assumed,
acquired or incurred prior to the effective date of such revocation; (iii)
Obligations created, contracted, assumed, acquired or incurred after the
effective date of such revocation pursuant to any agreement entered into or
commitment obtained prior to the effective date of such revocation; (iv) any
Obligations then or thereafter arising under the Loan Agreement or any of the
Security Documents as then in effect; (v) renewals, extensions, consolidations
and refinancings of any of the foregoing; (vi) principal, interest, charges,
fees, costs or expenses of any kind relating to any of the foregoing then
existing or thereafter arising, or (vii) any liabilities of any Guarantor other
than the particular Guarantor that issues such notice of revocation (or, in the
event of death of a Guarantor, is the subject of such death notice).

              1.2 This Guarantee will not be affected by any delay, failure or
omission of Lender in exercising any right, power or remedy with respect to any
of the Obligations or any guarantee or other liability or any collateral held by
it for any of the Obligations, by any delay, failure, or omission of Lender to
take any steps to perfect or maintain its lien or security interest in or to
preserve its rights to, or insure or protect any collateral for any of the
Obligations or any guarantee or other liability for any of the Obligations, or
by any irregularity, unenforceability or invalidity of any of the Obligations or
any part thereof or any security or other guarantee or liability therefor.

              1.3 Notice of acceptance of this Guarantee, notice of extensions
of credit to Borrower from time to time, notice of default, diligence,
presentment, protest, demand for payment, notice of demand or protest, and any
defense based upon a failure of Lender to comply with the notice requirements of
the applicable version of Uniform Commercial Code Section 9-504 are hereby
waived. Lender at any time and from time to time, without the consent of or
notice to Guarantor, and without impairing or releasing, discharging or
modifying the liabilities of Guarantor hereunder, may in its sole discretion (i)
change the manner, place or terms of payment or performance of or interest rates
on, or change or extend the time of payment or performance of, or other terms
relating to any of the Obligations, (ii) renew, increase, substitute, modify,
amend or alter, or grant consents or waivers relating to any of the Obligations,
any other guarantees or other liabilities, or any collateral for any Obligations
or guarantees or other liabilities, (iii) apply any and all payments from any
source whatsoever including any proceeds of any collateral, to any Obligations
of Borrower in any order, manner and amount, (iv) deal or refrain from dealing
with any person or entity, in its sole discretion, with respect to any
Obligations in such manner as Lender deems appropriate in its sole discretion,
and/or (v) accept, sell, substitute, exchange, compromise, release, surrender,
offset, realize upon or otherwise deal with in any manner and in any order any
of the Obligations, any guarantee or other liability for any of the Obligations,
or any collateral for any of the Obligations or for any guarantee or other
liability relating to any of the Obligations. Irrespective of the taking of or
refraining from taking any of the foregoing actions, the obligations of
Guarantor will remain in full force and effect and will not be affected,
impaired,

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discharged or released in any manner. Lender in its sole discretion may
determine the reasonableness of the period which may elapse prior to the making
of demand for any payment upon Borrower and it need not pursue any of its
remedies against Borrower, any other guarantor or other person, or any
collateral before having recourse against any Guarantor under this Guarantee.

              1.4 The books and records of Lender will be PRIMA FACIE evidence
of the Obligations and binding on Guarantor absent manifest error.

       2. REPRESENTATIONS, WARRANTIES AND COVENANTS. Guarantor hereby
represents, warrants and covenants as follows (all of which survive the
execution and delivery of this Guarantee):

              2.1 This Guarantee is a legal, valid and binding obligation of
Guarantor enforceable in accordance with its terms, except as such
enforceability may be limited by applicable bankruptcy, reorganization,
insolvency, moratorium or similar laws in effect from time to time affecting the
rights of creditors generally and except as such enforceability may be subject
to general principles of equity (regardless of whether such enforceability is
considered in a proceeding in law or in equity).

              2.2 There does not now exist any default or violation by it of or
under, and neither the execution, delivery and performance of this Guarantee nor
the consummation of any of the transactions contemplated hereby or by any of the
other documents securing this Guarantee, now existing or hereafter arising, if
any (collectively, the "Security Documents"), will result in any default or
violation, or in the creation or any lien or encumbrance, or give rise to any
right of termination, amendment, cancellation or acceleration, of or under, any
of the terms, conditions or obligations of: (i) its (with respect to any
Guarantor that is not a natural person) articles or certificate of incorporation
and regulations or bylaws, if a corporation, its partnership agreement,
partnership certificate and bylaws, if a partnership, its articles of
organization, operating agreement and bylaws, if a limited liability company, or
its organizational document, if some other type of entity or association, as
applicable; (ii) any note, bond, indenture, mortgage, deed of trust, franchise,
permit, lease or other agreement or instrument to which it is a party of by
which it or any of the its assets is bound; or (iii) any law, regulation,
ruling, order, injunction, decree, condition or other requirement applicable to
or imposed upon it by any law, court or governmental agency, authority or other
body.

              2.3 Guarantor is fully aware of the financial condition of
Borrower and is executing and delivering this Guarantee based solely upon
Guarantor's own independent investigation of all matters pertinent hereto and is
not relying in any manner upon any representation or statement of Lender.

              2.4 Guarantor will comply with all agreements and requirements
with which Guarantor is required to comply, or with which Borrower is required
to assure compliance by Guarantor under any of the documents or instruments
evidencing or relating to the Obligations.

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              2.5 Guarantor will give Lender prompt written notice of the
occurrence of any Default or Event of Default of which Guarantor has actual or
constructive notice.

       3. BANKRUPTCY, ETC. It is specifically understood that any modification,
limitation or discharge of the Obligations arising out of or by virtue of any
bankruptcy, reorganization or similar proceeding for relief of debtors under
federal or state law will not affect, modify, limit or discharge the liability
of Guarantor in any manner whatsoever and this Guarantee will remain and
continue in full force and effect and will be enforceable against Guarantor to
the same extent and with the same force and effect as if any such proceeding had
not been instituted. Guarantor waives all rights and benefits which might accrue
to it by reason of any such proceeding and will be liable to the full extent
hereunder, irrespective of any modification, limitation or discharge of the
liability of Borrower that may result from any such proceeding.

       4.     EVENTS OF DEFAULT.
              -----------------

              4.1 The occurrence of any of the following events will be deemed
to be an "Event of Default" under this Guarantee: (i) the filing by or against
Borrower or any Guarantor of a petition in bankruptcy, for a reorganization,
arrangement or debt adjustment, or for a receiver, trustee or similar creditors'
representative for its, his or her property or any part thereof, or of any other
proceeding under any federal or state insolvency or similar law (and if such
petition or proceeding is an involuntary petition or proceeding filed against it
without its acquiescence therein or thereto at any time, the same is not
promptly contested and, within 60 days of the filing of such petition or
proceedings, dismissed or discharged), or the making of any general assignment
by Borrower or any Guarantor for the benefit of creditors, or Borrower or any
Guarantor dissolves or is the subject of any dissolution, winding up or
liquidation; (ii) any other Event of Default (as defined in any of the
Obligations); or (iii) any default or event of default under any of the
Obligations that does not have a defined set of "Events of Default".

              4.2 Immediately and automatically upon any Event of Default under
clause (i) of the immediately preceding paragraph, or, at the option of Lender,
immediately upon the occurrence of any other Event of Default (in either case
without demand or notice of any kind, which hereby are expressly waived),
Guarantor will pay to Lender all amounts due and to become due under the
Obligations (for purposes of an Event of Default under clause (i) of the
immediately preceding paragraph all of the Obligations then existing will be
accelerated and become immediately due and payable in full from Guarantor,
whether or not then due and payable by Borrower). Such amounts will be paid by
Guarantor without setoff, counterclaim, presentment, demand, protest and notice
of demand, protest and dishonor, which hereby are expressly waived.

              4.3 The rights and remedies of Lender, after the occurrence of any
such Event of Default, will include but not be limited to the right to (i) set
off against and apply to all or any part of the Obligations, without notice, the
amount of any or all moneys, credits and other property of any nature whatsoever
of Guarantor now or at any time hereafter in the

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possession of, in transit to or from, under the control or custody of, or on
deposit with (whether held by Guarantor individually or jointly with another
person or entity), Lender or any Affiliate of Lender, and (ii) to exercise any
one or more of the rights and remedies provided a secured party under applicable
law with respect to any collateral securing this Guarantee, if any (the
"Collateral"). Guarantor waives any requirement of marshalling of any collateral
upon the occurrence of any Event of Default.

              5. SUBROGATION AND SUBORDINATION. Until all of the Obligations
irrevocably have been paid in full, Guarantor waives any and all rights of
subrogation, reimbursement or indemnity whatsoever and any and all right of
recourse to security, whether against Borrower or under or out of the property
of Borrower or otherwise, for the debts and Obligations of Borrower to Lender,
or any successor or assign thereof. No setoff, counterclaim, reduction or
diminution of any Obligation, or any defense of any kind or nature, that
Guarantor has or may have in the future against Borrower, or that Borrower has
or may have in the future against Lender, will be available hereunder to
Guarantor against Lender until all of the Obligations irrevocably have been paid
in full. Any indebtedness, liability or other obligation of Borrower now or
hereafter owed to Guarantor hereby is subordinated to the Obligations; and,
unless otherwise agreed by Lender, until all of the Obligations irrevocably have
been paid in full, all payments or other transfers made under or on account of
any such indebtedness, liability or other obligation will be received by
Guarantor as trustee for Lender and immediately paid over to Lender on account
of the Obligations but without in any manner reducing or affecting the liability
of Guarantor under this Guarantee.

              6. COSTS. To the extent that Lender incurs any costs or expenses
in protecting or enforcing its rights under this Guarantee or under any of the
documents that grant Lender a lien on the Collateral, if any, including but not
limited to reasonable Attorneys' Fees and the costs and expenses of litigation,
such costs and expenses will be due on demand, will be a direct and primary
obligation of Guarantor, will be secured by the Collateral, if any, and will
bear interest from the incurring or payment thereof at the Default Rate.

       7.     GENERAL.
              -------

              7.1 INDEMNITY AND REPAYMENTS OR RECOVERY FROM LENDER. Guarantor
will indemnify, defend and hold harmless Lender, its directors, officers,
counsel, agents and employees, from and against all claims, demands,
liabilities, judgments, losses, damages, costs and expenses, joint or several
(including all reasonable accounting fees and Attorneys' Fees), that Lender or
any such indemnified party may incur relating to or arising out of or in
connection with, in any way, directly or indirectly, this Guarantee, any of the
Obligations, Security Documents or Collateral, if any, or any act, omission,
matter or actual or proposed transaction under or with respect to any of the
foregoing, except the willful misconduct or gross negligence of such indemnified
party. Without limiting the generality of the foregoing, Guarantor agrees that
if at any time all or any part of any payment or transfer of any kind received
by Lender with respect to all or any part of the Obligations or this Guarantee
is repaid, set aside or invalidated by reason of any judgment, decree or order
of any court or administrative body, or by reason of any agreement, settlement
or compromise of any claim

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made at any time with respect to repayment, recovery, setting aside or
invalidation of all or any part of such payment or transfer, Guarantor's
obligations under this Guarantee will continue (and/or be reinstated) in full
force and effect and Guarantor will be liable, and Guarantor will indemnify,
defend and hold harmless Lender for, the amount or amounts so repaid, recovered,
set aside or invalidated and all other claims, demands, liabilities, judgments,
losses, damages, costs and expenses incurred in connection therewith. The
provisions of this Section will be and remain effective notwithstanding any
contrary action which may have been taken by Guarantor in reliance upon such
payment or transfer, and any such contrary action so taken will be without
prejudice to Lender's rights under this Guarantee and will be deemed to have
been conditioned upon such payment or transfer having become final and
irrevocable. The provisions of this Section will survive any revocation,
termination, cancellation or discharge of this Guarantee or of any of the
Obligations.

               7.2 NOTICES. All notices, demands, requests, consents or
approvals and other communications required or permitted hereunder will be in
writing and will be conclusively deemed to have been received by a party hereto
and to be effective if delivered personally to such party, or sent by telex,
facsimile (followed by written confirmation) or other telegraphic means, or by
overnight courier service, or by certified or registered mail, return receipt
requested, postage prepaid, addressed to such party at the address set forth
below or to such other address as any party may give to the other in writing for
such purpose:

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         To Lender:              KeyBank National Association
                                 525 Vine Street
                                 Cincinnati, Ohio  45202
                                 Attention: Louis A. Fender
                                 Telecopier No.: 513-762-8222

         To Guarantor:           Corplex, Inc.
                                 O'Gara Security International, Inc.
                                 O'Gara Satellite Networks, Inc.
                                 Kroll Environmental Enterprises, Inc.
                                 Kroll Information Services, Inc.
                                 Kroll Associates International Holdings, Inc.
                                 Kroll Background America, Inc.
                                 Kroll Lindquist Avey, Inc.
                                 Inphoto Surveillance, Inc.
                                 Kroll Schiff & Associates, Inc.
                                 Kroll Laboratory Specialists, Inc.
                                 Kroll-O'Gara Crisis Management Group, Inc.
                                 ITI Limited Partnership
                                 International Training, Incorporated and
                                 Kroll Buchler Phillips, Ltd.
                                 c/o The Kroll-O'Gara Company
                                 9113 LeSaint Drive
                                 Fairfield, Ohio  45014
                                 Attention: General Counsel
                                 Telecopier No.: 513-874-1262

                                    and

                                 The Kroll-O'Gara Company
                                 900 3rd Avenue
                                 New York, New York 10022
                                 Attn:  Chief Financial Officer
                                 Telecopier:  212-750-5628

All such communications, if personally delivered, will be conclusively deemed to
have been received by a party hereto and to be effective when so delivered, or
if sent by telex, facsimile or telegraphic means, on the day on which
transmitted, or if sent by overnight courier service, on the day after deposit
thereof with such service, or if sent by certified or registered mail, on the
third business day after the day on which deposited in the mail.

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              7.3 REMEDIES CUMULATIVE, ETC. The terms of this Guarantee may be
enforced as to any one or more breaches either separately, successively,
concurrently, independently or cumulatively from time to time and as often and
in such order as Lender may deem expedient, and no single or partial exercise of
any right or remedy will preclude any further exercise thereof. No right or
remedy herein conferred upon or reserved to Lender hereunder is intended to be
exclusive of any other available right or remedy, but each and every such right
or remedy will be cumulative and will be in addition to every other right or
remedy given under this Guarantee or now or hereafter existing at law or in
equity or by statute. No delay or omission to exercise any right, remedy or
power accruing upon any Event of Default or default, omission or failure of
performance hereunder or under any of the Obligations will impair any such
right, remedy or power or will be construed to be a waiver thereof or an
acquiescence therein, nor will it affect any subsequent Event of Default or
default of the same or a different nature.

              7.4 WAIVERS AND MODIFICATIONS. No delay or failure on the part of
Lender to exercise any right, remedy or power hereunder, under any of the
Security Documents, under any of the Obligations or under applicable law will
impair or waive any such right, remedy or power (or any other right, remedy or
power), be considered a waiver of or an acquiescence in any breach, Default or
Event of Default or affect any other or subsequent breach, Default or Event of
Default of the same or a different nature. No waiver of any breach, Default or
Event of Default, nor any modification, waiver, discharge or termination of any
provision of this Guarantee or any of the Security Documents, nor consent to any
departure by any Guarantor therefrom, will be established by conduct, custom or
course of dealing; and no modification, waiver, discharge, termination or
consent will in any event be effective unless the same is in writing, signed by
Lender and specifically refers to this Guarantee, and then such modification,
waiver, discharge, termination or consent will be effective only in the specific
instance and for the specific purpose for which given. No notice to or demand on
any Guarantor in any case will entitle any Guarantor to any other or further
notice or demand in the same or any similar or other circumstance.

              7.5 BINDING EFFECT, ASSIGNABILITY. If this Guarantee is executed
by more than one Guarantor, the obligations of such persons or entities
hereunder will be joint and several. Any reference to "Guarantor" will mean each
such person or entity individually and collectively. This Guarantee will be
binding upon Guarantor and Guarantor's heirs, administrators, successors and
assigns and inure to the benefit of Lender and its successors and assigns;
provided, however, that Guarantor may not assign this Guarantee in whole or in
part without the prior written consent of Lender, and Lender at any time may
assign this Guarantee in whole or in part. If any or all of the Obligations are
assigned by Lender, this Guarantee will inure to the benefit of Lender's
assignee, and to the benefit of any subsequent assignee, to the extent of the
assignment or assignments; provided that no assignment will operate to relieve
Guarantor from any duty to Lender hereunder with respect to any unassigned
portion of the Obligations.

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<PAGE>   9

              7.6 GENDER, ETC. Whenever used herein, the singular number will
include the plural, the plural the singular and the use of the masculine,
feminine or neuter gender will include all genders.

              7.7 HEADINGS. The headings in this Guarantee are for convenience
only and will not limit or otherwise affect any of the terms hereof.

              7.8 COMPLETE AGREEMENT. This Guarantee and the Security Documents
constitute the entire agreement of the parties and supersede all prior oral and
written negotiations, agreements and understandings regarding the subject matter
of this Guarantee.

              7.9 COUNTERPARTS. This Guarantee may be executed in one or more
counterparts, each of which will be deemed to be an original and all of which
together will constitute one and the same instrument; provided, however, that
failure of any Guarantor to sign any or all counterparts will not affect the
liability of any other Guarantor hereunder.

              7.10 ILLEGALITY. If any provision of this Guarantee is prohibited
by or invalid under applicable law, such provision will be ineffective only to
the extent of such prohibition or invalidity without invalidating the remainder
of such provision and without invalidating any other provision herein; provided,
however, that if the provision that is the subject of such prohibition or
invalidity pertains to payment, then, at the option of Lender, all of the
Obligations will become immediately due and payable.

              7.11 GOVERNING LAW. This Guarantee has been delivered and accepted
at and will be deemed to have been made at Cincinnati, Ohio and will be
interpreted and the rights and liabilities of the parties hereto determined in
accordance with the laws of the State of Ohio, without regard to conflicts of
law principles.

              7.12 JURISDICTION AND WAIVER OF JURY TRIAL. GUARANTOR HEREBY
IRREVOCABLY AGREES AND SUBMITS TO THE EXCLUSIVE JURISDICTION OF ANY STATE OR
FEDERAL COURT LOCATED WITHIN HAMILTON COUNTY, OHIO, OR, AT THE OPTION OF LENDER
IN ITS SOLE DISCRETION, OF ANY STATE OR FEDERAL COURT(S) LOCATED WITHIN ANY
OTHER COUNTY, STATE OR JURISDICTION IN WHICH LENDER AT ANY TIME OR FROM TIME TO
TIME CHOOSES IN ITS SOLE DISCRETION TO BRING AN ACTION OR OTHERWISE EXERCISE A
RIGHT OR REMEDY, AND GUARANTOR WAIVES ANY OBJECTION BASED ON FORUM NON
CONVENIENS AND ANY OBJECTION TO VENUE OF ANY SUCH ACTION OR PROCEEDING.
GUARANTOR HEREBY IRREVOCABLY CONSENTS THAT ALL SERVICE OF PROCESS BE MADE BY
CERTIFIED MAIL DIRECTED TO GUARANTOR AT ITS ADDRESS SET FORTH HEREIN FOR NOTICES
AND SERVICE SO MADE WILL BE DEEMED TO BE COMPLETED THE EARLIER OF GUARANTOR'S
ACTUAL RECEIPT THEREOF OR FIVE (5) BUSINESS DAYS AFTER THE SAME HAS BEEN
DEPOSITED IN U.S. MAILS, POSTAGE PREPAID. NOTHING CONTAINED HEREIN WILL PREVENT
LENDER FROM SERVING PROCESS IN ANY OTHER MANNER PERMITTED BY LAW. GUARANTOR AND
LENDER EACH WAIVE ANY RIGHT TO TRIAL BY JURY IN ANY ACTION OR PROCEEDING
RELATING TO THIS GUARANTEE, THE SECURITY DOCUMENTS, THE OBLIGATIONS, THE
COLLATERAL, IF ANY, OR ANY ACTUAL OR PROPOSED TRANSACTION OR OTHER MATTER
CONTEMPLATED IN OR RELATING TO ANY OF THE FOREGOING.

                            [SIGNATURES ON NEXT PAGE]

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<PAGE>   10

                                       CORPLEX, INC.

                                       By:
                                          --------------------------------------
                                                Abram Gordon

                                       Title:
                                             -----------------------------------
                                       Date:  March 30, 2001

                                       O'GARA SECURITY INTERNATIONAL, INC.

                                       By:
                                          --------------------------------------
                                                Abram Gordon

                                       Title:
                                             -----------------------------------
                                       Date:  March 30, 2001

                                       O'GARA SATELLITE NETWORKS, INC.

                                       By:
                                          --------------------------------------
                                                Abram Gordon

                                       Title:
                                             -----------------------------------
                                       Date:  March 30, 2001

                                       KROLL ENVIRONMENTAL ENTERPRISES, INC.

                                       By:
                                          --------------------------------------
                                                Abram Gordon

                                       Title:
                                             -----------------------------------
                                       Date:  March 30, 2001

                                       KROLL INFORMATION SERVICES, INC.

                                       By:
                                          --------------------------------------
                                                Abram Gordon

                                       Title:
                                             -----------------------------------
                                       Date:  March 30, 2001

                                       10
<PAGE>   11

                                       KROLL ASSOCIATES INTERNATIONAL
                                       HOLDINGS, INC.

                                       By:
                                          --------------------------------------
                                                Abram Gordon

                                       Title:
                                             -----------------------------------
                                       Date:  March 30, 2001

                                       KROLL BACKGROUND AMERICA, INC.

                                       By:
                                          --------------------------------------
                                                Abram Gordon

                                       Title:
                                             -----------------------------------
                                       Date:  March 30, 2001

                                       KROLL LINDQUIST AVEY, INC.

                                       By:
                                          --------------------------------------
                                                Abram Gordon

                                       Title:
                                             -----------------------------------
                                       Date:  March 30, 2001

                                       INPHOTO SURVEILLANCE, INC.

                                       By:
                                          --------------------------------------
                                                Abram Gordon

                                       Title:
                                             -----------------------------------
                                       Date:  March 30, 2001

                                       KROLL SCHIFF & ASSOCIATES, INC.

                                       By:
                                          --------------------------------------
                                                Abram Gordon

                                       Title:
                                             -----------------------------------

                                       11
<PAGE>   12

                                       Date:  March 30, 2001

                                       KROLL LABORATORY SPECIALISTS, INC.

                                       By:
                                          --------------------------------------
                                                Abram Gordon

                                       Title:
                                             -----------------------------------
                                       Date:  March 30, 2001

                                       KROLL-O'GARA CRISIS
                                       MANAGEMENT GROUP, INC.

                                       By:
                                          --------------------------------------
                                                Abram Gordon

                                       Title:
                                             -----------------------------------
                                       Date:  March 30, 2001

                                       ITI LIMITED PARTNERSHIP

                                       By:
                                          --------------------------------------
                                                Abram Gordon

                                       Title:
                                             -----------------------------------
                                       Date:  March 30, 2001

                                       INTERNATIONAL TRAINING, INCORPORATED

                                       By:
                                          --------------------------------------
                                                Abram Gordon

                                       Title:
                                             -----------------------------------
                                       Date:  March 30, 2001

                                       KROLL BUCHLER PHILLIPS, LTD.

                                       By:
                                          --------------------------------------
                                                Abram Gordon

                                       12

<PAGE>   13

                                       Title:
                                             -----------------------------------
                                       Date:  March 30, 2001

                                       13<PAGE>   1
                                                                   Exhibit 10.18

                             STOCK PLEDGE AGREEMENT

       THIS STOCK PLEDGE AGREEMENT (the "Agreement"), dated as of March 30,
2001, is made and entered into by and among THE KROLL-O'GARA COMPANY, an Ohio
corporation (the "Borrower") and KEYBANK NATIONAL ASSOCIATION, a national
banking association, as Collateral Agent (together with its successors and
assigns the "Collateral Agent"), for the ratable benefit of the Secured Parties,
under the Collateral Agency and Intercreditor Agreement dated as of the date
hereof amount the Collateral Agent, KEYBANK NATIONAL ASSOCIATION a national
banking association, in its individual capacity (together with its successors
and assigns, the "Bank") and the holders of the Senior Notes due May 30, 2003 of
the Borrower, as the same may be amended and modified from time to time.

       WHEREAS, pursuant to the Collateral Agency and Intercreditor Agreement,
certain of the Secured Parties have provided loans and other credit to the
Borrower; and

       WHEREAS, as part of the security for such loans and credit, and as
required by the Collateral Agency and Intercreditor Agreement, Borrower has
agreed to pledge to the Collateral Agent certain of the issued and outstanding
capital stock, and all income, interest, dividends, and distributions thereon,
replacements and substitutions therefor, and the proceeds thereof, in the
following subsidiaries of Borrower: O'GARA-HESS & EISENHARDT ARMORING COMPANY,
O'GARA SATELLITE NETWORKS, INC., O'GARA SATELLITE NETWORKS LIMITED (IRISH),
O'GARA SATELLITE NETWORKS LIMITED (UK), NEXT DESTINATION LIMITED, O'GARA
SECURITY ASSOCIATES, INC., THE O'GARA COMPANY FSC, INC., KROLL HOLDINGS, INC.,
L.A.M.B. ACQUISITION, INC., L.A.M.B. ACQUISITION II, INC., INPHOTO SURVEILLANCE,
INC., LABORATORY SPECIALISTS OF AMERICA, INC., KROLL SCHIFF & ASSOCIATES, INC.,
SECURIFY, INC., FINANCIAL RESEARCH, INC., KROLL-O'GARA UK LIMITED AND KROLL
BACKGROUND AMERICA, INC. (individually, "Subsidiary" and collectively,
"Subsidiaries"); and

       WHEREAS, Borrower owns the outstanding capital stock of the Subsidiaries
as set forth on SCHEDULE A hereto.

       NOW, THEREFORE, intending to be legally bound hereby, the parties hereto
agree as follows:

1.     DEFINED TERMS.

       1.1    Except as otherwise expressly provided herein, capitalized terms
              used in this Agreement shall have the respective meanings assigned
              to them in the Collateral Agency and Intercreditor Agreement. No
              change or amendment to any defined term contained in the
              Collateral Agency and Intercreditor Agreement used in this
              Security Agreement as a defined term shall be effective without
              the prior written consent of Debtor. Where applicable and except
              as otherwise expressly provided herein, terms used herein (whether
              or not capitalized) shall have the respective meanings assigned to
              them in the Uniform Commercial Code as enacted in each applicable
              jurisdiction and as may be amended from time to time (the "Code").

                                       14
<PAGE>   2

       1.2    In this Agreement, "Pledged Collateral" means and includes the
              following: (i) the securities listed on SCHEDULE A attached hereto
              and made a part hereof, and all rights and privileges pertaining
              thereto, including, without limitation, all securities and
              additional securities receivable in respect of or in exchange for
              such securities, all rights to subscribe for securities incident
              to or arising from ownership of such securities, all cash,
              interest, stock and other dividends or distributions paid or
              payable on such securities, and all books and records pertaining
              to the foregoing, including, without limitation, all stock record
              and transfer books, (ii) any and all other securities hereafter
              pledged by Borrower to the Collateral Agent, for the benefit of
              the Secured Parties, to secure the Secured Obligations (as
              hereinafter defined) of the Borrower, and all rights and
              privileges pertaining thereto, including, without limitation, all
              securities and additional securities receivable in respect of or
              in exchange for such securities, all rights to subscribe for
              securities incident to or arising from ownership of such
              securities, all cash, interest, stock and other dividends or
              distributions paid or payable on such securities, and all books
              and records pertaining to the foregoing, and (iii) whatever is
              received when any of the foregoing is sold, exchanged or otherwise
              disposed of, including any proceeds as such term is defined in the
              Code.

2.     GRANT OF SECURITY INTERESTS.
       ---------------------------

       2.1    Borrower, to secure on a first priority basis the payment and
              performance of all Obligations, hereby grants to the Collateral
              Agent, for the benefit of the Secured Parties, a first priority
              security interest in all of the Borrower's now existing and
              hereafter acquired and/or arising right, title and interest in, to
              and under the Pledged Collateral owned by Borrower, whether now or
              hereafter existing and wherever located.

       2.2    Upon the execution and delivery of this Agreement, Borrower has
              delivered to and deposited with the Collateral Agent in pledge,
              stock certificates and any other instruments evidencing the
              Pledged Collateral, together with undated stock powers signed in
              blank by Borrower.

3.     FURTHER ASSURANCES. Prior to or concurrently with the execution of this
       Agreement, and thereafter at any time and from time to time upon
       reasonable request of the Collateral Agent, Borrower shall execute and
       deliver to the Collateral Agent, for the benefit of the Secured Parties,
       all financing statements, continuation financing statements, termination
       statements, assignments, certificates and documents of title, affidavits,
       reports, notices, schedules of account, letters of authority, further
       pledges, powers of attorney and all other documents (collectively, the
       "Security Documents") which the Collateral Agent may reasonably request,
       in form reasonably satisfactory to the Collateral Agent, and take such
       other action which the Collateral Agent may request, to perfect and
       continue perfected and to create and maintain the first priority status
       of the Collateral Agent's security interest in (subject only to Permitted
       Liens) the Pledged Collateral and to fully consummate the transactions
       contemplated under the Collateral Agency and Intercreditor Agreement, the
       other Credit Documents and this Agreement. Borrower hereby irrevocably
       makes, constitutes and appoints the Collateral Agent (and any of the

                                      -2-
<PAGE>   3

       Collateral Agent's officers or employees or agents designated by the
       Collateral Agent) as Borrower's true and lawful attorney with power to
       sign the name of Borrower on all or any of the Security Documents which
       the Collateral Agent determines must be executed, filed, recorded or sent
       in order to perfect or continue perfected the Collateral Agent's security
       interest in the Pledged Collateral. Such power, being coupled with an
       interest, is irrevocable until all of the Secured Obligations have been
       indefeasibly paid in full.

4.     REPRESENTATIONS AND WARRANTIES. Borrower hereby represents and warrants
       to the Collateral Agent, for the benefit of the Secured Parties, as
       follows:

       4.1    Borrower has, and will continue to have (or, in the case of
              after-acquired Pledged Collateral, at the time Borrower acquires
              rights in such Pledged Collateral, will have), title to the
              Pledged Collateral, free and clear of all liens other than the
              liens permitted by the other Credit Documents (herein referred to
              as the "Permitted Liens").

       4.2    The shares of capital stock constituting the Pledged Collateral
              have been duly authorized and validly issued to Borrower (as set
              forth on SCHEDULE A hereto), are fully paid and nonassessable and,
              except as may be set forth on SCHEDULE A hereto, together
              constitute all of the issued and outstanding capital stock of the
              Subsidiaries.

       4.3    Except for the Permitted Liens and except with respect to any of
              the subsidiaries which are organized under the laws of a foreign
              country, the security interests in the Pledged Collateral granted
              hereunder are valid, perfected and of first priority.

       4.4    Except with respect to any of the subsidiaries which are organized
              under the laws of a foreign country, there are no restrictions
              upon the transfer of the Pledged Collateral, and Borrower has the
              power and authority and right to transfer the Pledged Collateral
              owned by Borrower free of any encumbrances and without obtaining
              the consent of any Person.

       4.5    Except with respect to any of the subsidiaries which are organized
              under the laws of a foreign country, Borrower has all necessary
              power to execute, deliver and perform this Agreement.

       4.6    Except as disclosed in the Disclosure Schedule to the Second
              Amended and Restated Loan Agreement with Bank, there are no
              actions, suits, or proceedings pending or, to Borrower's best
              knowledge after due inquiry, threatened against or affecting
              Borrower with respect to the Pledged Collateral, at law or in
              equity or before or by any Governmental Authority (as defined in
              the Credit Documents), and Borrower is not in default with respect
              to any judgment, writ, injunction, decree, rule or regulation
              which could adversely affect Borrower's performance hereunder.

       4.7    Except with respect to any of the subsidiaries which are organized
              under the laws of a foreign country, this Agreement has been duly
              executed and delivered and constitutes the valid and legally
              binding obligation of Borrower, enforceable in

                                      -3-
<PAGE>   4

              accordance with its terms, except to the extent that
              enforceability of this Agreement may be limited by applicable
              bankruptcy, insolvency, reorganization, moratorium or other
              similar laws affecting the enforceability of creditors' rights
              generally or limiting the right of specific performance.

       4.8    Except with respect to any of the subsidiaries which are organized
              under the laws of a foreign country, neither the execution and
              delivery by Borrower of this Agreement, nor the compliance with
              the terms and provisions hereof, will violate any provision of any
              law or conflict with or result in a breach of any of the terms,
              conditions or provisions of any judgment, order, injunction,
              decree or ruling of any Governmental Authority to which Borrower
              is subject or any provision of any agreement, understanding or
              arrangement to which Borrower is a party or by which Borrower is
              bound.

5.     GENERAL COVENANTS. In addition to any covenants and agreements of
       Borrower set forth in the other Credit Documents, which are incorporated
       herein by this reference, Borrower hereby covenants and agrees as
       follows:

       5.1    Borrower shall do all reasonable acts that may be necessary and
              appropriate to maintain, preserve and protect the Pledged
              Collateral; Borrower shall be responsible for the risk of loss of,
              damage to, or destruction of the Pledged Collateral owned by
              Borrower, unless such loss is the result of the gross negligence
              or willful misconduct of the Collateral Agent.

       5.2    Borrower shall appear in and defend any action or proceeding of
              which Borrower is aware which could reasonably be expected to
              affect Borrower's title to, or the Collateral Agent's interest in,
              the Pledged Collateral owned by Borrower and the proceeds thereof;
              PROVIDED, HOWEVER, that Borrower may settle such actions or
              proceedings with respect to the Pledged Collateral Borrower owns
              with the consent of the Collateral Agent, which consent shall not
              be unreasonably withheld or delayed.

       5.3    Borrower shall keep separate, accurate and complete records of the
              Pledged Collateral owned by Borrower, disclosing the Collateral
              Agent's security interest hereunder.

       5.4    Borrower shall comply with all laws applicable to the Pledged
              Collateral unless such noncompliance would not individually or in
              the aggregate materially impair the use or value of the Pledged
              Collateral or the Collateral Agent's rights hereunder.

       5.5    Borrower shall pay any and all taxes, duties, fees or imposts of
              any nature imposed by any state, federal or local authority on any
              of the Pledged Collateral, except to the extent contested in good
              faith by appropriate proceedings.

       5.6    Borrower shall permit the Collateral Agent, its officers,
              employees and agents at reasonable times to inspect all books and
              records related to the Pledged Collateral.

                                      -4-
<PAGE>   5

       5.7    To the extent, following the date hereof, Borrower acquires
              capital stock of any Subsidiary or any of the rights, property or
              securities described in the definition of Pledged Collateral with
              respect to such Subsidiary, such stock, rights, property or
              securities shall be, upon such acquisition, pledged to the
              Collateral Agent, for the benefit of the Secured Parties, and
              Borrower shall deliver an updated SCHEDULE A hereto to the
              Collateral Agent.

       5.8    Borrower shall not sell, assign, transfer or otherwise dispose of
              the Pledged Collateral.

6.     OTHER RIGHTS WITH RESPECT TO PLEDGED COLLATERAL. In addition to the other
       rights with respect to the Pledged Collateral granted to the Collateral
       Agent, for the benefit of the Secured Parties, hereunder, at any time and
       from time to time, after and during the continuation of an Event of
       Default, the Collateral Agent, at its option and at the expense of the
       Borrower, may (a) transfer into its own name, or into the name of its
       nominee, all or any part of the Pledged Collateral, thereafter receiving
       all dividends, income or other distributions upon the Pledged Collateral;
       (b) take control of and manage all or any of the Pledged Collateral; (c)
       apply to the payment of any of the Secured Obligations, whether any be
       due and payable or not, any moneys, including cash dividends and income
       from any Pledged Collateral, now or hereafter in the hands of the
       Collateral Agent or any Affiliate of the Collateral Agent, on deposit or
       otherwise, belonging to Borrower, as the Collateral Agent, in its sole
       discretion, shall determine; and (d) do anything which Borrower is
       required but fails to do hereunder.

7.     ADDITIONAL REMEDIES UPON EVENT OF DEFAULT. Upon the occurrence of any
       Event of Default and while such Event of Default shall be continuing, the
       Collateral Agent shall have, in addition to all rights and remedies of a
       secured party under the Code or other applicable law, and in addition to
       its rights under SECTION 6 above and under the other Credit Documents,
       the following rights and remedies:

       7.1    The Collateral Agent may, after thirty (30) days' advance notice
              to Borrower, sell, assign, give an option or options to purchase
              or otherwise dispose of the Pledged Collateral or any part thereof
              at public or private sale, at any of the Collateral Agent's
              offices or elsewhere, for cash, on credit or for future delivery,
              and upon such other terms as the Collateral Agent may deem
              commercially reasonable. Borrower agrees that thirty (30) days'
              advance notice of the time and place of any public sale or the
              time after which any private sale is to be made shall constitute
              reasonable notification. The Collateral Agent shall not be
              obligated to make any sale of Pledged Collateral regardless of
              notice of sale having been given. The Collateral Agent may adjourn
              any public or private sale from time to time by announcement at
              the time and place fixed therefor, and such sale may, without
              further notice, be made at the time and place to which it was so
              adjourned. Borrower recognizes that the Collateral Agent may be
              compelled to resort to one or more private sales of the Pledged
              Collateral to a restricted group of purchasers who will be obliged
              to agree, among other things, to acquire such securities for their
              own account for investment and not with a view to the distribution
              or resale thereof.

                                      -5-
<PAGE>   6

       7.2    The proceeds of any collection, sale or other disposition of the
              Pledged Collateral of Borrower, or any part thereof, shall, after
              the Collateral Agent has made all deductions of expenses,
              including but not limited to attorneys' fees and other expenses
              incurred in connection with repossession, collection, sale or
              disposition of such Pledged Collateral or in connection with the
              enforcement of the Collateral Agent's rights with respect to the
              Pledged Collateral in any insolvency, bankruptcy or reorganization
              proceedings, be applied against the Secured Obligations, whether
              or not all the same be then due and payable, as follows:

              7.2.1  first, to the Secured Obligations and to reimburse the
                     Collateral Agent for out-of-pocket costs, expenses and
                     disbursements, including without limitation reasonable
                     attorneys' fees and legal expenses, incurred by the
                     Collateral Agent in connection with realizing on the
                     Pledged Collateral or collection of any obligation of
                     Borrower under any of the Credit Documents, including
                     advances made subsequent to an Event of Default by the
                     Collateral Agent or any of the Secured Parties for the
                     reasonable maintenance, preservation, protection or
                     enforcement of, or realization upon, the Pledged
                     Collateral, including without limitation advances for
                     taxes, insurance, repairs, and the like, and reasonable
                     expenses incurred to sell or otherwise realize on, or
                     prepare for sale of or other realization on, any of the
                     Pledged Collateral, in such order as the Collateral Agent
                     may determine in its discretion; and

              7.2.2  the balance, if any, as required by law.

8.     COLLATERAL AGENT'S DUTIES. The powers conferred on the Collateral Agent
       hereunder are solely to protect its interest and the interests of the
       Secured Parties in the Pledged Collateral and shall not impose any duty
       upon it to exercise any such powers. Except for the safe custody of any
       Pledged Collateral in its possession and the accounting for moneys
       actually received by it hereunder and as otherwise provided in the
       Collateral Agency and Intercreditor Agreement, Collateral Agent shall
       have no duty as to any Pledged Collateral or as to the taking of any
       necessary steps to preserve rights against prior parties or any other
       rights pertaining to any Pledged Collateral.

9.     NO WAIVER; CUMULATIVE REMEDIES. No failure to exercise, and no delay in
       exercising, on the part of the Collateral Agent, any right, power or
       privilege hereunder shall operate as a waiver of any such right, power or
       privilege; nor shall any single or partial exercise of any right, power
       or privilege hereunder preclude any further exercise of any such right,
       power or privilege or the exercise of any other right, power or
       privilege. The remedies herein provided are cumulative and not exclusive
       of any remedies provided under the other Credit Documents or by law.
       Borrower waives any right to require the Collateral Agent to proceed
       against any other Person or to exhaust any of the Pledged Collateral or
       other security for the Obligations or to pursue any remedy in the
       Collateral Agent's power.

10.    ASSIGNMENT. All rights of the Collateral Agent under this Agreement shall
       inure to the benefit of its successors and assigns. All obligations of
       Borrower shall bind its

                                      -6-
<PAGE>   7

       successors and assigns; provided, however, Borrower may not assign or
       transfer any of its rights and obligations hereunder or any interest
       herein.

11.    SUBJECT TO COLLATERAL AGENCY AND INTERCREDITOR AGREEMENT. Any and all
       rights granted to the Collateral Agent under this Agreement are to be
       held and exercised by the Collateral Agent pursuant to the terms of the
       Collateral Agency and Intercreditor Agreement. Any and all obligations
       hereunder of the parties to this Agreement, and the rights granted to the
       Collateral Agent hereunder, are created and granted subject to the terms
       of the Collateral Agency and Intercreditor Agreement.

12.    SEVERABILITY. Any provision of this Agreement which shall be held invalid
       or unenforceable shall be ineffective without invalidating the remaining
       provisions hereof.

13.    GOVERNING LAW. This Agreement shall be construed in accordance with and
       governed by the internal laws of the State of Ohio without regard to its
       conflicts of law principles, except to the extent the validity or
       perfection of the security interests or the remedies hereunder in respect
       of any Pledged Collateral are governed by the law of a jurisdiction other
       than the State of Ohio.

14.    NOTICES. All notices, requests, demands, directions and other
       communications (collectively, "notices") given to or made upon any party
       hereto under the provisions of this Agreement shall be by telephone or in
       writing (including telex or facsimile communication) unless otherwise
       expressly permitted hereunder and shall be delivered or sent by telex or
       facsimile to the respective parties at the addresses and numbers set
       forth below or in accordance with any subsequent unrevoked written
       direction from any party to the others. All notices shall, except as
       otherwise expressly herein provided, be effective in the case of telex or
       facsimile, when received, in the case of hand-delivered notice, when hand
       delivered, or in the case of telephone when telephoned, provided,
       however, that in order to be effective, telephonic notices must be
       confirmed in writing no later than the next day by letter, facsimile or
       telex.

              The Collateral Agent:

                                      -7-
<PAGE>   8

                           KeyBank National Association
                           525 Vine Street
                           Cincinnati, Ohio  45202
                           Attn:  Louis A. Fender
                           Telecopier No.:  (513) 762-8222

                  Borrower:

                           The Kroll O'Gara Company
                           9113 LeSaint Drive
                           Fairfield, Ohio 45014
                           Attn:  General Counsel
                           Telecopier: (513) 874-1262

                                    and

                           The Kroll-O'Gara Company
                           900 3rd Avenue
                           New York, New York 10022
                           Attn:  Chief Financial Officer
                           Telecopier:  212-750-5628

15.    SPECIFIC PERFORMANCE. Borrower acknowledges and agrees that, in addition
       to the other rights of the Collateral Agent hereunder and under the other
       Credit Documents, because the Collateral Agent's remedies at law for
       failure of Borrower to comply with the provisions hereof relating to the
       Collateral Agent's rights (i) to inspect the books and records related to
       the Pledged Collateral, (ii) to receive the various notifications
       Borrower is required to deliver hereunder, (iii) to obtain copies of
       agreements and documents as provided herein with respect to the Pledged
       Collateral, (iv) to enforce the provisions hereof pursuant to which
       Borrower has appointed the Collateral Agent its attorney-in-fact, and (v)
       to enforce the Collateral Agent's remedies hereunder, would be inadequate
       and that any such failure would not be adequately compensable in damages,
       Borrower agrees that each such provision hereof may be specifically
       enforced.

16.    VOTING RIGHTS IN RESPECT OF THE PLEDGED COLLATERAL. So long as no Event
       of Default shall occur and be continuing under the Collateral Agency and
       Intercreditor Agreement, Borrower may exercise any and all voting and
       other consensual rights pertaining to the Pledged Collateral or any part
       thereof for any purpose not inconsistent with the terms of this Agreement
       or the other Credit Documents; PROVIDED, HOWEVER, that Borrower will not
       exercise or will refrain from exercising any such right, as the case may
       be, if such action would have a material adverse effect on the value of
       any Pledged Collateral.

17.    ENTIRE AGREEMENT; AMENDMENTS. This Agreement constitutes the entire
       agreement between the parties with respect to the subject matter hereof
       and supersedes all prior agreements relating to a grant of a security
       interest in the Pledged Collateral by Borrower.

                                      -8-
<PAGE>   9

       This Agreement may not be amended or supplemented except by a writing
       signed by the Collateral Agent and Borrower.

18.    COUNTERPARTS. This Agreement may be executed in any number of
       counterparts and by different parties hereto in separate counterparts,
       each of which when so executed will be deemed to be an original and all
       of which taken together will constitute one and the same agreement. Any
       party so executing this Agreement by facsimile transmission shall
       promptly deliver a manually executed counterpart, provided that any
       failure to do so shall not affect the validity of the counterpart
       executed by facsimile transmission.

19.    DESCRIPTIVE HEADINGS. The descriptive headings which are used in this
       Agreement are for the convenience of the parties only and shall not
       affect the meaning of any provision of this Agreement.

         (REMAINDER OF PAGE INTENTIONALLY BLANK, SIGNATURE PAGE FOLLOWS)

                                      -9-
<PAGE>   10

       IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
duly executed as of the date first above written.

                                       KEYBANK NATIONAL ASSOCIATION,
                                       in its capacity as Collateral Agent

                                       By:
                                          --------------------------------------
                                             Louis A. Fender
                                             Senior Vice President

                                       THE KROLL-O'GARA COMPANY

                                       By:
                                          --------------------------------------
                                             Abram Gordon

                                       Title:
                                             -----------------------------------

                                      -10-
<PAGE>   11

                                   SCHEDULE A
                                       TO
                             STOCK PLEDGE AGREEMENT

                        DESCRIPTION OF PLEDGED COLLATERAL
                        ---------------------------------

<TABLE>
<CAPTION>

---------------------------------------------------------------------------------------------------------------
SHAREHOLDER                               TYPE AND AMOUNT OF OWNERSHIP
---------------------------------------------------------------------------------------------------------------
<S>                                       <C>
The Kroll O'Gara Company                  100% common stock of O'Gara-Hess & Eisenhardt Armoring Company
---------------------------------------------------------------------------------------------------------------
The Kroll O'Gara Company                  100% common stock of O'Gara Satellite Networks, Inc.
---------------------------------------------------------------------------------------------------------------
The Kroll O'Gara Company                  65% ordinary shares of O'Gara Satellite Networks Limited, an Irish
                                          Corporation
---------------------------------------------------------------------------------------------------------------
The Kroll O'Gara Company                  65% ordinary shares of O'Gara Satellite Networks
                                          Limited, a corporation under the laws of England and Wales
---------------------------------------------------------------------------------------------------------------
The Kroll O'Gara Company                  65% ordinary shares of Next Destination Limited,
                                          a corporation under the laws of England and Wales
---------------------------------------------------------------------------------------------------------------
The Kroll O'Gara Company                  100% common stock of O'Gara Security Associates, Inc.
---------------------------------------------------------------------------------------------------------------
The Kroll O'Gara Company                  65% ordinary shares of The O'Gara Company FSC, Inc., a Barbados
                                          corporation
---------------------------------------------------------------------------------------------------------------
The Kroll O'Gara Company                  100% common stock of Kroll Holdings, Inc.
---------------------------------------------------------------------------------------------------------------
The Kroll O'Gara Company                  100% common stock of L.A.M.B. Acquisition, Inc.
---------------------------------------------------------------------------------------------------------------
The Kroll O'Gara Company                  100% common stock of L.A.M.B. Acquisition II, Inc.
---------------------------------------------------------------------------------------------------------------
The Kroll O'Gara Company                  100% common stock of InPhoto Surveillance, Inc.
---------------------------------------------------------------------------------------------------------------
The Kroll O'Gara Company                  100% common stock of Laboratory Specialists of America, Inc.
---------------------------------------------------------------------------------------------------------------
The Kroll O'Gara Company                  100% common stock of Kroll Schiff & Associates, Inc.
---------------------------------------------------------------------------------------------------------------
The Kroll O'Gara Company                  100% common stock of Securify, Inc.
---------------------------------------------------------------------------------------------------------------
The Kroll O'Gara Company                  100% common stock of Financial Research, Inc.
---------------------------------------------------------------------------------------------------------------
The Kroll O'Gara Company                  65% ordinary shares of Kroll-O'Gara UK Limited,
                                          a limited corporation under the laws of England and Wales
---------------------------------------------------------------------------------------------------------------
The Kroll O'Gara Company                  100% common stock of Kroll Background America, Inc.
---------------------------------------------------------------------------------------------------------------
</TABLE>

<PAGE>   12

                      ASSIGNMENT SEPARATE FROM CERTIFICATE

       FOR VALUE RECEIVED, __________________________ does hereby sell, assign
and transfer unto _____________________, as Collateral Agent for Secured
Parties, ________________ (____) Shares of the Common Capital Stock of
O'GARA-HESS & EISENHARDT ARMORING COMPANY, standing in the undersigned's name on
the books of such corporation represented by Certificate No. _____________ and
does hereby irrevocably constitute and appoint _______________________ attorney
to transfer such stock on the books of the within named Corporation with full
power of substitution in the premises.

       Further under penalties of perjury, the undersigned certifies:

       1.     That the number shown on this form is the undersigned's correct
              taxpayer identification number.

       2.     That the undersigned is not subject to backup withholding either
              because the undersigned has not been notified that the undersigned
              is subject to backup withholding as a result of a failure to
              report all interest or dividends, or the Internal Revenue Service
              has notified the undersigned that the undersigned is no longer
              subject to backup withholding.

Taxpayer Identification #31-1470817

Dated
-----------------------------------

                                       THE KROLL-O'GARA COMPANY

                                       By:
                                          ---------------------------------
                                       Name: Abram Gordon

In presence of

-----------------------------------

<PAGE>   13

                      ASSIGNMENT SEPARATE FROM CERTIFICATE

       FOR VALUE RECEIVED, ___________________________________ does hereby sell,
assign and transfer unto ____________________________________________, as
Collateral Agent for Secured Parties, __________________ (___) Shares of the
Common Capital Stock of O'GARA SATELLITE NETWORKS, INC., standing in the
undersigned's name on the books of such corporation represented by Certificate
No. ______________ and does hereby irrevocably constitute and appoint
________________________________ attorney to transfer such stock on the books of
the within named Corporation with full power of substitution in the premises.

       Further under penalties of perjury, the undersigned certifies:

       1.     That the number shown on this form is the undersigned's correct
              taxpayer identification number.

       2.     That the undersigned is not subject to backup withholding either
              because the undersigned has not been notified that the undersigned
              is subject to backup withholding as a result of a failure to
              report all interest or dividends, or the Internal Revenue Service
              has notified the undersigned that the undersigned is no longer
              subject to backup withholding.

Taxpayer Identification #31-1470817

Dated
     ------------------------------

                                            THE KROLL-O'GARA COMPANY

                                            By:
                                               ----------------------
                                            Name:  Abram Gordon

In presence of

-----------------------------------

<PAGE>   14

                      ASSIGNMENT SEPARATE FROM CERTIFICATE

       FOR VALUE RECEIVED, ________________________ does hereby sell, assign and
transfer unto ___________________________________, as Collateral Agent for
Secured Parties, _____________________ (___) Shares of the Ordinary Shares of
O'GARA SATELLITE NETWORKS LIMITED, an Irish corporation, standing in the
undersigned's name on the books of such corporation represented by Certificate
No. __________________ and does hereby irrevocably constitute and appoint
__________________________ attorney to transfer such stock on the books of the
within named Corporation with full power of substitution in the premises.

       Further under penalties of perjury, the undersigned certifies:

       1.     That the number shown on this form is the undersigned's correct
              taxpayer identification number.

       2.     That the undersigned is not subject to backup withholding either
              because the undersigned has not been notified that the undersigned
              is subject to backup withholding as a result of a failure to
              report all interest or dividends, or the Internal Revenue Service
              has notified the undersigned that the undersigned is no longer
              subject to backup withholding.

Taxpayer Identification #31-1470817

Dated
     ----------------------------------

                                             THE KROLL-O'GARA COMPANY

                                             By:
                                                --------------------------------
                                             Name:  Abram Gordon

In presence of

-----------------------------------

<PAGE>   15

                      ASSIGNMENT SEPARATE FROM CERTIFICATE

       FOR VALUE RECEIVED, __________________________ does hereby sell, assign
and transfer unto __________________________________, as Collateral Agent for
Secured Parties, _____________________ (____) Shares of the Ordinary Shares of
O'GARA SATELLITE NETWORKS LIMITED, a corporation under the laws of England and
Wales, standing in the undersigned's name on the books of such corporation
represented by Certificate No. ______________ and does hereby irrevocably
constitute and appoint ____________________________ attorney to transfer such
stock on the books of the within named Corporation with full power of
substitution in the premises.

       Further under penalties of perjury, the undersigned certifies:

       1.     That the number shown on this form is the undersigned's correct
              taxpayer identification number.

       2.     That the undersigned is not subject to backup withholding either
              because the undersigned has not been notified that the undersigned
              is subject to backup withholding as a result of a failure to
              report all interest or dividends, or the Internal Revenue Service
              has notified the undersigned that the undersigned is no longer
              subject to backup withholding.

Taxpayer Identification #31-1470817

Dated
     ------------------------------

                                          THE KROLL-O'GARA COMPANY

                                          By:
                                             ------------------------------
                                          Name:  Abram Gordon

In presence of

-----------------------------------

<PAGE>   16

                      ASSIGNMENT SEPARATE FROM CERTIFICATE

       FOR VALUE RECEIVED, ___________________________________ does hereby sell,
assign and transfer unto _______________________________, as Collateral Agent
for Secured Parties, __________________________ (____) Shares of the Ordinary
Shares of NEXT DESTINATION LIMITED, standing in the undersigned's name on the
books of such corporation represented by Certificate No. _____________________
and does hereby irrevocably constitute and appoint ____________________________
attorney to transfer such stock on the books of the within named Corporation
with full power of substitution in the premises.

       Further under penalties of perjury, the undersigned certifies:

       1.     That the number shown on this form is the undersigned's correct
              taxpayer identification number.

       2.     That the undersigned is not subject to backup withholding either
              because the undersigned has not been notified that the undersigned
              is subject to backup withholding as a result of a failure to
              report all interest or dividends, or the Internal Revenue Service
              has notified the undersigned that the undersigned is no longer
              subject to backup withholding.

Taxpayer Identification #31-1470817

Dated
      -----------------------------

                                            THE KROLL-O'GARA COMPANY

                                            By:
                                               --------------------------------
                                            Name:  Abram Gordon

In presence of

-----------------------------------

<PAGE>   17

                      ASSIGNMENT SEPARATE FROM CERTIFICATE

       FOR VALUE RECEIVED, ____________________________ does hereby sell, assign
and transfer unto ______________________________________, as Collateral Agent
for Secured Parties, ___________________ (____) Shares of the Common Capital
Stock of O'GARA SECURITY ASSOCIATES, INC. standing in the undersigned's name on
the books of such corporation represented by Certificate No. ___________________
and does hereby irrevocably constitute and appoint _____________________________
attorney to transfer such stock on the books of the within named Corporation
with full power of substitution in the premises.

       Further under penalties of perjury, the undersigned certifies:

       1.     That the number shown on this form is the undersigned's correct
              taxpayer identification number.

       2.     That the undersigned is not subject to backup withholding either
              because the undersigned has not been notified that the undersigned
              is subject to backup withholding as a result of a failure to
              report all interest or dividends, or the Internal Revenue Service
              has notified the undersigned that the undersigned is no longer
              subject to backup withholding.

Taxpayer Identification #31-1470817

Dated
     -------------------------------

                                            THE KROLL-O'GARA COMPANY

                                            By:
                                               --------------------------------
                                            Name:  Abram Gordon

In presence of

-----------------------------------

<PAGE>   18

                      ASSIGNMENT SEPARATE FROM CERTIFICATE

       FOR VALUE RECEIVED, __________________________ does hereby sell, assign
and transfer unto ________________________________, as Collateral Agent for
Secured Parties, ______________________ (_________) Shares of the Ordinary
Shares of THE O'GARA COMPANY FSC, INC., standing in the undersigned's name on
the books of such corporation represented by Certificate No. __________________
and does hereby irrevocably constitute and appoint ____________________________
attorney to transfer such stock on the books of the within named Corporation
with full power of substitution in the premises.

       Further under penalties of perjury, the undersigned certifies:

       1.     That the number shown on this form is the undersigned's correct
              taxpayer identification number.

       2.     That the undersigned is not subject to backup withholding either
              because the undersigned has not been notified that the undersigned
              is subject to backup withholding as a result of a failure to
              report all interest or dividends, or the Internal Revenue Service
              has notified the undersigned that the undersigned is no longer
              subject to backup withholding.

Taxpayer Identification #31-1470817

Dated
      -----------------------------

                                            THE KROLL-O'GARA COMPANY

                                            By:
                                               ---------------------------------
                                            Name:  Abram Gordon

In presence of

-----------------------------------

<PAGE>   19

                      ASSIGNMENT SEPARATE FROM CERTIFICATE

       FOR VALUE RECEIVED, _____________________________ does hereby sell,
assign and transfer unto ______________________________, as Collateral Agent for
Secured Parties, ____________________ (_____) Shares of the Common Capital Stock
of KROLL HOLDINGS, INC., standing in the undersigned's name on the books of such
corporation represented by Certificate No. _________________ and does hereby
irrevocably constitute and appoint _________________________________ attorney to
transfer such stock on the books of the within named Corporation with full power
of substitution in the premises.

       Further under penalties of perjury, the undersigned certifies:

       1.     That the number shown on this form is the undersigned's correct
              taxpayer identification number.

       2.     That the undersigned is not subject to backup withholding either
              because the undersigned has not been notified that the undersigned
              is subject to backup withholding as a result of a failure to
              report all interest or dividends, or the Internal Revenue Service
              has notified the undersigned that the undersigned is no longer
              subject to backup withholding.

Taxpayer Identification #31-1470817

Dated
     ------------------------------

                                            THE KROLL-O'GARA COMPANY

                                            By:
                                               ---------------------------------
                                            Name:  Abram Gordon

In presence of

-----------------------------------

<PAGE>   20

                      ASSIGNMENT SEPARATE FROM CERTIFICATE

       FOR VALUE RECEIVED, _______________________________ does hereby sell,
assign and transfer unto _____________________________, as Collateral Agent for
Secured Parties, ____________________ (______) Shares of the Common Capital
Stock of L.A.M.B. ACQUISITION, INC., standing in the undersigned's name on the
books of such corporation represented by Certificate No. ____________________
and does hereby irrevocably constitute and appoint ___________________________
attorney to transfer such stock on the books of the within named Corporation
with full power of substitution in the premises.

       Further under penalties of perjury, the undersigned certifies:

       1.     That the number shown on this form is the undersigned's correct
              taxpayer identification number.

       2.     That the undersigned is not subject to backup withholding either
              because the undersigned has not been notified that the undersigned
              is subject to backup withholding as a result of a failure to
              report all interest or dividends, or the Internal Revenue Service
              has notified the undersigned that the undersigned is no longer
              subject to backup withholding.

Taxpayer Identification #31-1470817

Dated
     ------------------------------

                                            THE KROLL-O'GARA COMPANY

                                            By:
                                               --------------------------------
                                            Name:  Abram Gordon

In presence of

----------------------------------

<PAGE>   21

                      ASSIGNMENT SEPARATE FROM CERTIFICATE

       FOR VALUE RECEIVED, _______________________________ does hereby sell,
assign and transfer unto ______________________________, as Collateral Agent for
Secured Parties, ____________________ (_______) Shares of the Common Capital
Stock of L.A.M.B. ACQUISITION II, INC., standing in the undersigned's name on
the books of such corporation represented by Certificate No. ___________________
and does hereby irrevocably constitute and appoint _____________________________
attorney to transfer such stock on the books of the within named Corporation
with full power of substitution in the premises.

       Further under penalties of perjury, the undersigned certifies:

       1.     That the number shown on this form is the undersigned's correct
              taxpayer identification number.

       2.     That the undersigned is not subject to backup withholding either
              because the undersigned has not been notified that the undersigned
              is subject to backup withholding as a result of a failure to
              report all interest or dividends, or the Internal Revenue Service
              has notified the undersigned that the undersigned is no longer
              subject to backup withholding.

Taxpayer Identification #31-1470817

Dated
     ------------------------------

                                            THE KROLL-O'GARA COMPANY

                                            By:
                                               --------------------------------
                                            Name:  Abram Gordon

In presence of

----------------------------------

<PAGE>   22

                      ASSIGNMENT SEPARATE FROM CERTIFICATE

       FOR VALUE RECEIVED, ____________________________ does hereby sell, assign
and transfer unto ________________________________, as Collateral Agent for
Secured Parties, ______________________ (__________) Shares of the Common
Capital Stock of INPHOTO SURVEILLANCE, INC., standing in the undersigned's name
on the books of such corporation represented by Certificate No. _______________
and does hereby irrevocably constitute and appoint ___________________________
attorney to transfer such stock on the books of the within named Corporation
with full power of substitution in the premises.

       Further under penalties of perjury, the undersigned certifies:

       1.     That the number shown on this form is the undersigned's correct
              taxpayer identification number.

       2.     That the undersigned is not subject to backup withholding either
              because the undersigned has not been notified that the undersigned
              is subject to backup withholding as a result of a failure to
              report all interest or dividends, or the Internal Revenue Service
              has notified the undersigned that the undersigned is no longer
              subject to backup withholding.

Taxpayer Identification #31-1470817

Dated
     ------------------------------

                                            THE KROLL-O'GARA COMPANY

                                            By:
                                               ---------------------------------
                                            Name:  Abram Gordon

In presence of

-----------------------------------

<PAGE>   23

                      ASSIGNMENT SEPARATE FROM CERTIFICATE

       FOR VALUE RECEIVED, ____________________________ does hereby sell, assign
and transfer unto ___________________________________, as Collateral Agent for
Secured Parties, _________________ (________) Shares of the Common Capital Stock
of LABORATORY SPECIALISTS OF AMERICA, INC., standing in the undersigned's name
on the books of such corporation represented by Certificate No. _______________
and does hereby irrevocably constitute and appoint _____________________________
attorney to transfer such stock on the books of the within named Corporation
with full power of substitution in the premises.

       Further under penalties of perjury, the undersigned certifies:

       1.     That the number shown on this form is the undersigned's correct
              taxpayer identification number.

       2.     That the undersigned is not subject to backup withholding either
              because the undersigned has not been notified that the undersigned
              is subject to backup withholding as a result of a failure to
              report all interest or dividends, or the Internal Revenue Service
              has notified the undersigned that the undersigned is no longer
              subject to backup withholding.

Taxpayer Identification #31-1470817

Dated
     ------------------------------

                                            THE KROLL-O'GARA COMPANY

                                            By:
                                               --------------------------------
                                            Name:  Abram Gordon

In presence of

--------------------------------

<PAGE>   24

                      ASSIGNMENT SEPARATE FROM CERTIFICATE

       FOR VALUE RECEIVED, ______________________________ does hereby sell,
assign and transfer unto _________________________________, as Collateral Agent
for Secured Parties, __________________ (_________) Shares of the Common Capital
Stock of KROLL SCHIFF & ASSOCIATES, INC., standing in the undersigned's name on
the books of such corporation represented by Certificate No. ___________________
and does hereby irrevocably constitute and appoint _____________________________
attorney to transfer such stock on the books of the within named Corporation
with full power of substitution in the premises.

       Further under penalties of perjury, the undersigned certifies:

       1.     That the number shown on this form is the undersigned's correct
              taxpayer identification number.

       2.     That the undersigned is not subject to backup withholding either
              because the undersigned has not been notified that the undersigned
              is subject to backup withholding as a result of a failure to
              report all interest or dividends, or the Internal Revenue Service
              has notified the undersigned that the undersigned is no longer
              subject to backup withholding.

Taxpayer Identification #31-1470817

Dated
      -----------------------------

                                            THE KROLL-O'GARA COMPANY

                                            By:
                                               ---------------------------------
                                            Name:  Abram Gordon

In presence of

-----------------------------------

<PAGE>   25

                      ASSIGNMENT SEPARATE FROM CERTIFICATE

       FOR VALUE RECEIVED, _________________________ does hereby sell, assign
and transfer unto ___________________________________, as Collateral Agent for
Secured Parties, ____________________ (__________) Shares of the Common Capital
Stock of SECURIFY, INC., standing in the undersigned's name on the books of such
corporation represented by Certificate No. _______________ and does hereby
irrevocably constitute and appoint ____________________________ attorney to
transfer such stock on the books of the within named Corporation with full power
of substitution in the premises.

       Further under penalties of perjury, the undersigned certifies:

       1.     That the number shown on this form is the undersigned's correct
              taxpayer identification number.

       2.     That the undersigned is not subject to backup withholding either
              because the undersigned has not been notified that the undersigned
              is subject to backup withholding as a result of a failure to
              report all interest or dividends, or the Internal Revenue Service
              has notified the undersigned that the undersigned is no longer
              subject to backup withholding.

Taxpayer Identification #31-1470817

Dated
     ------------------------------

                                            THE KROLL-O'GARA COMPANY

                                            By:
                                               --------------------------------
                                            Name:  Abram Gordon

In presence of

------------------------------------

<PAGE>   26

                      ASSIGNMENT SEPARATE FROM CERTIFICATE

       FOR VALUE RECEIVED, ___________________________ does hereby sell, assign
and transfer unto ______________________________, as Collateral Agent for
Secured Parties, ____________________ (_____) Shares of the Common Capital Stock
of FINANCIAL RESEARCH, INC., standing in the undersigned's name on the books of
such corporation represented by Certificate No. and does hereby irrevocably
constitute and appoint _____________________________ attorney to transfer such
stock on the books of the within named Corporation with full power of
substitution in the premises.

       Further under penalties of perjury, the undersigned certifies:

       1.     That the number shown on this form is the undersigned's correct
              taxpayer identification number.

       2.     That the undersigned is not subject to backup withholding either
              because the undersigned has not been notified that the undersigned
              is subject to backup withholding as a result of a failure to
              report all interest or dividends, or the Internal Revenue Service
              has notified the undersigned that the undersigned is no longer
              subject to backup withholding.

Taxpayer Identification #31-1470817

Dated
     ------------------------------

                                            THE KROLL-O'GARA COMPANY

                                            By:
                                               --------------------------------
                                            Name:  Abram Gordon

In presence of

-----------------------------------

<PAGE>   27

                      ASSIGNMENT SEPARATE FROM CERTIFICATE

       FOR VALUE RECEIVED, ________________________________ does hereby sell,
assign and transfer unto _________________________, as Collateral Agent for
Secured Parties, ( _______ ) Shares of the Ordinary Shares of KROLL-O'GARA UK
LIMITED standing in the undersigned's name on the books of such corporation
represented by Certificate No. _______________ and does hereby irrevocably
constitute and appoint ____________________ attorney to transfer such stock on
the books of the within named Corporation with full power of substitution in the
premises.

       Further under penalties of perjury, the undersigned certifies:

       1.     That the number shown on this form is the undersigned's correct
              taxpayer identification number.

       2.     That the undersigned is not subject to backup withholding either
              because the undersigned has not been notified that the undersigned
              is subject to backup withholding as a result of a failure to
              report all interest or dividends, or the Internal Revenue Service
              has notified the undersigned that the undersigned is no longer
              subject to backup withholding.

Taxpayer Identification #31-1470817

Dated
     ------------------------------

                                            THE KROLL-O'GARA COMPANY

                                            By:
                                               ---------------------------------
                                            Name:  Abram Gordon

In presence of

-----------------------------------

<PAGE>   28

                      ASSIGNMENT SEPARATE FROM CERTIFICATE

       FOR VALUE RECEIVED, _______________________________ does hereby sell,
assign and transfer unto __________________________________, as Collateral Agent
for Secured Parties, _______________________ (__________) Shares of the Common
Capital Stock of KROLL BACKGROUND AMERICA, INC. standing in the undersigned's
name on the books of such corporation represented by Certificate NO.
____________________ and does hereby irrevocably constitute and appoint
_____________________________ attorney to transfer such stock on the books of
the within named Corporation with full power of substitution in the premises.

       Further under penalties of perjury, the undersigned certifies:

       1.     That the number shown on this form is the undersigned's correct
              taxpayer identification number.

       2.     That the undersigned is not subject to backup withholding either
              because the undersigned has not been notified that the undersigned
              is subject to backup withholding as a result of a failure to
              report all interest or dividends, or the Internal Revenue Service
              has notified the undersigned that the undersigned is no longer
              subject to backup withholding.

Taxpayer Identification #31-1470817

Dated
      -----------------------------

                                            THE KROLL-O'GARA COMPANY

                                            By:
                                               ---------------------------------
                                            Name:  Abram Gordon

In presence of

-----------------------------------

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