Document:

<PAGE>

                                                                   EXHIBIT 10.11

                            [UROCOR, INC. LETTERHEAD]

December 17, 1999

Mr. John L. Armstrong
14365 W. 142nd St.
Olathe, KS  66062

Dear Jack:

This letter will formally outline the details that were discussed concerning
the position of VICE PRESIDENT OF BUSINESS DEVELOPMENT, which reports to Mike
George. The objective of this letter is to outline the offer to you.

START DATE:  December 22, 1999

BASE SALARY:  $6,153.85 bi-weekly ($160,000 annually)

BONUS: Annual bonus potential of 35% of your annual salary based primarily on
achievement of corporate financial objectives, as well as individual
accomplishments.

BENEFITS:
-    UroCor Employee Benefits consist of the following and may change for the
     purpose of increased benefit or lower cost through negotiation with
     carriers.
-    Term Life Insurance at two (2) times annual salary (capped at $200,000)
     paid for you.
-    Disability Insurance (short and long term) paid for you.
-    401K Retirement Plan - Begin contributing first month after hire and
     company matched upon enrollment up to 50% of first 6% of annual salary.
-    Workers Compensation, Unemployment and Social Security
-    Employee Stock Purchase Program, which is available for enrollment
     semi-annually and is designed to allow employees the ability to
     purchase UroCor stock at a discount to the market.

PAID TIME OFF: You are given 25 days paid time off per year. You will begin
accruing days upon your hire date but cannot begin utilizing this time until the
completion of your 90 day introductory period.

STOCK OPTIONS: UroCor offers a stock option program. This option requires a five
year vesting period for 90,000 shares of UroCor stock. A price per share will be
set based upon the date the option receives Board approval. Vesting starts on
your employment date.
OTHER PROVISIONS: In the event of termination without "cause", or resignation
for "good reason" the company will provide six (6) months base salary paid on a
bi-weekly basis. For purposes of this entire offer letter: (1) "cause" is
limited to fraud, embezzlement or conviction of a felony involving moral
turpitude, and (2) "good reason" shall be defined as your job title and/or
responsibilities being reduced from Vice President of Business Development. It
is also understood that any severance received under this offer letter shall not
be subject to offset or duty to mitigate.

In the event of a change of control, you shall receive eighteen (18) months
severance, and all of our options will vest immediately. In the event the Board
approves a plan that affords greater benefits to Senior Management than those
stipulated in this offer letter, you will, of course, participate in the Board
approved plan. For purposes of this Offer Letter, "change in control" shall be
defined as change in ownership or control as contemplated in Section 280G of the
Internal Revenue Code.

Every employee is required to sign a Confidentiality and Non-Compete
Agreement with UroCor, Inc. As with all employees, your employment is "at
will", and as such, this agreement does not represent a contract. Your first
90 days of employment are considered an Introductory Period, and during that
period you will accrue benefits as described in the Employee Manual. No
manager or representative of UroCor, Inc., other than the President of
UroCor, Inc., has authority to enter into any employment agreement.

As an employee of UroCor, Inc. you will be provided with a copy of the UroCor,
Inc. Employee Manual and insurance booklets which outline our personnel policies
and benefits program. You will be expected to read these materials thoroughly,
and sign and
<PAGE>

return a copy of the "Receipt and Acknowledgment of UroCor Employee
Manual". Any questions regarding UroCor policy, benefits administration or
eligibility should be directed to Inez Dunn, Benefits Coordinator, (ext. 4121).

Our offer to hire you is contingent upon satisfactory completion of employment
references and your submission of proof of your identity and your legal
authorization to work in the United States. If you fail to submit this proof,
federal law prohibits us from hiring you. It is also contingent upon your safe
driving record through the motor vehicle department, which you are required to
provide. In addition, A negative drug screen is a condition of employment.

Jack, we feel that you could make a great contribution to our department and
company and look forward to your response.

Very truly yours,                          Accepted by:

/s/ Michael W. George

Mike George                                /s/ John L. Armstrong     12/22/99
President and Chief Executive Officer      -----------------------------------
                                           John L. Armstrong          Date<PAGE>

                                                                   EXHIBIT 10.12

                               INDEMNITY AGREEMENT

         THIS AGREEMENT (this "Agreement") is made as of the ______ day of
________, ____, between UroCor, Inc., a Delaware corporation (the
"Corporation"), and ___________________________ ("Indemnified Party").

                            WITNESSETH:

         WHEREAS, Indemnified Party is, or is about to become, an officer or a
member of the Board of Directors of the Corporation and in such capacity is
performing a valuable service for Corporation;

         WHEREAS, Indemnified Party may from time to time serve as a
director, officer, employee, agent or fiduciary of other corporations,
partnerships, joint ventures, trusts or other enterprises, entities or plans
at the request of the Corporation in order to pursue the Corporation's
interests;

         WHEREAS, the Bylaws (the "Bylaws") of Corporation provide for the
mandatory indemnification of the officers, directors, agents and employees of
the Corporation to the maximum extent authorized by Section 145 of the
Delaware General Corporation Statute, as amended hereafter (the "State
Statute");

         WHEREAS, such Bylaws and the State Statute specifically provide that
they are not exclusive and thereby contemplate that contracts or other
arrangements not inconsistent with the State Statute may be entered into
between the Corporation and the members of its Board of Directors and its
officers with respect to indemnification of such directors and officers;

         WHEREAS, in accordance with the authorization provided by the State
Statute, Corporation has purchased and will maintain a policy of Directors'
and Officers' Liability Insurance ("D&O Insurance"), covering certain
liabilities that may be incurred by its directors and officers in the
performance of their services for Corporation, possibly including certain
liabilities for which indemnification by the Corporation is not authorized or
permitted under the State Statute;

         WHEREAS, uncertainties with respect to the terms and availability of
D&O Insurance and with respect to the application, amendment and enforcement
of statutory and by-law indemnification provisions make it desirable to
supplement and enhance the adequacy and reliability of the protection
afforded to directors and officers thereby; and

         WHEREAS, to supplement and enhance the protection afforded
Indemnified Party and to induce Indemnified Party to continue to serve as a
member of the Board of Directors or as an officer of the Corporation, the
Corporation has determined and agreed to enter into this Agreement with
Indemnified Party, which has been approved and adopted by the Corporation's
Board of Directors;
<PAGE>

NOW, THEREFORE, in consideration of Indemnified Party's continued service as
a director or an officer of the Corporation after the date hereof the parties
hereto agree as follows:

         1.       DEFINITIONS.  For purposes of this Agreement:

         "Litigation Costs" means costs, charges, expenses and obligations,
including, without limitation, all bonds, expenses of investigation, fees and
expenses of experts, accountants or other professionals, travel and lodging
expenses, court costs, transcript costs, duplicating costs, printing and
binding costs, telephone charges, postage, delivery fees and attorneys' fees,
retainers and expenses, reasonably incurred or contracted for in the
investigation, defense or prosecution of or other involvement in any
Proceeding and any appeal therefrom, and all costs of appeal, attachment,
supersedeas and other bonds that may be relevant to any Proceeding.

         "Losses" means the total of all amounts which Indemnified Party
becomes, or may become, legally obligated to pay in connection with any
Proceeding, including (without limitation) judgments, penalties, fines, court
or investigative costs, amounts paid in settlement, amounts lost or ordered
forfeited pursuant to injunctive sanctions, and all Litigation Costs.

         "Proceeding" means any threatened, pending or completed action,
suit, arbitration, mediation, alternative dispute resolutions mechanism,
proceeding, subpoena compliance, inquiry or investigation, whether civil,
criminal, administrative or investigative (whether external and involving
outside parties or internal to the Corporation, including, but not limited
to, an action by or in the right of the Corporation and any internal
investigation conducted by the Board of Directors or any committee or other
designee thereof or any other person), and whether formal or informal.

         2.       INDEMNITY OF INDEMNIFIED PARTY. The Corporation hereby
agrees to indemnify Indemnified Party to the fullest extent authorized or
permitted by the provisions of the State Statute, including, but not limited
to, (a) the maximum extent permitted by the provisions of the State Statute
which provide that the State Statute is not the exclusive basis for
indemnification of directors and officers and (b) the maximum extent
authorized or permitted by any amendment thereof or other statutory provision
authorizing or permitting such indemnification which is adopted after the
date hereof.

         3.       ADDITIONAL INDEMNITY. In addition to and not in
substitution for or diminution of the obligations of indemnification set
forth in Section 2 hereof, the Corporation hereby further agrees to indemnify
Indemnified Party to the fullest extent permitted by law against any and all
Litigation Costs and Losses of Indemnified Party in connection with any
Proceeding to which Indemnified Party is, was or at any time becomes a party,
or is threatened to be made a party or otherwise becomes involved (other than
as plaintiff except where being a plaintiff or intervenor is necessary to
avoid RES JUDICATA or collateral estoppel or other estoppel or other result
as to matters which may adversely impact Indemnified Party) by reason of the
fact that Indemnified Party is, was or at any time becomes a director,
officer, employee, agent or fiduciary of the Corporation, or is or was
serving or at any time serves at the request of the Corporation as a
director, officer, employee, agent or fiduciary of another corporation,
partnership, joint venture, trust or other enterprise or any benefit plan
related to the business and affairs of the Corporation, and specifically
including any Proceeding brought pursuant to the provisions of Section 16(b)
of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or
any other provision under the Exchange Act and the Securities Act of 1933, as
amended, and the rules and regulations thereunder.

         4.       LIMITATIONS ON INDEMNITY. No amounts of Indemnity pursuant
to Section 2 or 3 hereof shall be paid by the Corporation:

                  (a) except to the extent that the aggregate of Litigation
         Costs and Losses in any Proceeding or group of related Proceedings to
         be indemnified hereunder exceeds the amount of Litigation Costs and
         Losses for which the Indemnified Party actually receives
         indemnification payments or on whose behalf indemnification payments
         are made pursuant to any D&O Insurance policy or from any other source;
<PAGE>

                  (b) on account of any payments required to be paid by an
         Indemnified Party as a result of any Proceeding in which a final,
         non-appealable judgment is rendered against Indemnified Party for an
         accounting or disgorgement of profits made from the purchase or sale by
         Indemnified Party of securities of the Corporation pursuant to the
         provisions of Section 16(b) of the Exchange Act;

                  (c) on account of Indemnified Party's conduct which is finally
         adjudged in any Proceeding to have been knowingly fraudulent,
         deliberately dishonest or an act or omission involving willful
         misconduct; or

                  (d) if a final non-appealable decision by a court having
         jurisdiction over the parties and the subject matter shall determine
         that such indemnification is not lawful.

         5.       CONTINUATION OF INDEMNITY. All agreements and obligations
of the Corporation contained herein shall continue during the period
Indemnified Party is a director, officer, employee, agent or fiduciary of the
Corporation (or is or was serving at the request of the Corporation as a
director, officer, employee, agent or fiduciary of another corporation,
partnership, joint venture, trust or other enterprise or any benefit plan
related to the business and affairs of the Corporation or of any of its
affiliates, subsidiaries, associates or other entities in which it is
interested) and shall continue thereafter so long as Indemnified Party shall
be subject to any possible Litigation Costs or Losses in any Proceeding by
reason of the fact that Indemnified Party was a director, officer, employee,
agent or fiduciary of the Corporation (or is or was serving at the request of
the Corporation as a director, officer, employee, agent or fiduciary of
another corporation, partnership, joint venture, trust or other enterprise or
any such benefit plan).

         6.       NOTIFICATION AND DEFENSE OF CLAIM. Promptly after receipt
by Indemnified Party of notice of the commencement of any Proceeding,
Indemnified Party shall, if a claim in respect thereof is to be made against
the Corporation under this Agreement, give written notice to the Corporation
of the commencement thereof as promptly as practicable; but the omission so
to notify the Corporation will not relieve the Corporation from any liability
that it may have to Indemnified Party unless the Corporation can demonstrate
by clear and convincing evidence that it was materially prejudiced by the
failure to receive such notice. With respect to any such Proceeding as to
which Indemnified Party becomes involved:

                  (a) the Corporation will be entitled to participate therein at
         its own expense;

                  (b) except as otherwise provided below, to the extent that it
         may wish, the Corporation may, jointly with any other indemnifying
         party, assume the defense thereof, with outside counsel that must be
         reasonably satisfactory to Indemnified Party. After notice from the
         Corporation to Indemnified Party of its election so to assume the
         defense thereof (and consent of Indemnified Party as to the
         Corporation's choice of outside counsel, which consent will not be
         unreasonably withheld), the Corporation will be liable to Indemnified
         Party under this Agreement for all Litigation Costs (subject to Section
         4 above and other than as provided below with respect to attorneys'
         fees) incurred in connection therewith. Indemnified Party shall have
         the right to employ personal counsel in such Proceeding, but the fees
         and expenses of such counsel incurred after notice from the Corporation
         of its assumption of the defense thereof (and consent of Indemnified
         Party as to the Corporation's choice of outside counsel) shall be at
         the expense of Indemnified Party, unless (i) the employment of counsel
         for Indemnified Party has been authorized by the Corporation, (ii)
         Indemnified Party shall have concluded in good faith that there may be
         a conflict of interest between the Corporation and Indemnified Party in
         the conduct of the defense (or part of the defense) of such action, or
         (iii) the Corporation in fact shall not have employed counsel to assume
         the defense of such action, in each of which cases the fees and
         expenses of counsel shall be at the expense of the Corporation. The
         Corporation shall not be entitled to assume the defense of any
         Proceeding brought by or on behalf of the Corporation or as to which
         Indemnified Party shall have made the conclusion provided for in clause
         (ii) of this Section 6(b); and
<PAGE>

                  (c) the Corporation shall not be liable to indemnify
         Indemnified Party under this Agreement for any Losses paid in
         settlement of any Proceeding or claim effected without its written
         consent. The Corporation shall not settle any Proceeding or claim in
         any manner that would impose any penalty, sanction or limitation on
         Indemnified Party, or otherwise effectively indicate the existence of
         any wrongful act by Indemnified Party, without Indemnified Party's
         written consent. Neither the Corporation nor Indemnified Party shall
         unreasonably withhold its consent to any proposed settlement. Without
         intending to limit the circumstances in which it would be unreasonable
         for the Corporation to withhold its consent to a settlement, the
         parties hereto agree it would be unreasonable for the Corporation to
         withhold its consent to a settlement in an amount that did not exceed,
         in the business judgment of the Board of Directors of the Corporation,
         the estimated amount of Litigation Costs of Indemnified Party to
         litigate the Proceeding to conclusion, provided that there is no other
         materially adverse consequence to the Corporation from such settlement.

         7.       NO PRESUMPTIONS. The termination of any Proceeding by
judgment, order, settlement, conviction or upon a plea of NOLO CONTENDERE or
its equivalent, shall not, of itself, create a presumption that (a)
Indemnified Party did not act in good faith, (b) with respect to any criminal
action or proceeding, Indemnified Party had reasonable cause to believe that
his or her conduct constituted a criminal violation or (c) Indemnified Party
was knowingly fraudulent, deliberately dishonest or committed an act, or made
an omission, involving willful misconduct.

         8.       MANDATORY ADVANCEMENT OF EXPENSES. At the request of
Indemnified Party, Litigation Costs incurred or contracted for by him or her
in any Proceeding shall be paid by the Corporation on a continuing and
current basis, in advance of the final disposition of such matter, with the
undertaking which Indemnified Party makes hereby that if it shall be
ultimately determined that Indemnified Party was not entitled to be
indemnified therefor, or was not entitled to be fully indemnified therefor,
Indemnified Party shall repay to the Corporation the amount, or appropriate
portion thereof, so advanced. Such advancement and current payment of
Litigation Costs by the Corporation shall be made promptly (but in any event
within 10 days) after receipt by the Corporation of Indemnified Party's
request therefor.

         9.       REPAYMENT OF EXPENSES. Indemnified Party agrees that
Indemnified Party will reimburse the Corporation for all Litigation Costs
paid by the Corporation in connection with any Proceeding in which
Indemnified Party is involved in the event and only to the extent that it
shall be ultimately determined by final non-appealable judgment of a court of
competent jurisdiction that Indemnified Party is not entitled to be
indemnified by the Corporation for such Litigation Costs under the provisions
of the State Statute, the Bylaws and this Agreement.

         10.      PROCEDURE.

                  (a) Indemnification hereunder shall be made promptly and in
         any event within 30 days of Indemnified Party's written request
         therefor, unless (i) an affirmative determination is made reasonably
         and within such 30-day period by the Corporation in the manner provided
         in Section 10(b) below that Indemnified Party is not entitled to
         indemnity hereunder for any reason other than as contemplated by clause
         (ii) of this Section 10(a), or (ii) an affirmative determination is
         required by the State Statute or other applicable law that the
         Indemnified Party met an applicable standard of conduct, in which case
         the Corporation will cause such determination to be made within 60 days
         from the date of the written request for indemnity.

                  (b) The determination to be made by the Corporation under
         Section 10(a) above shall be based on the facts known at the time and
         shall be made (i) by the Board of Directors of the Corporation, by a
         majority vote of a quorum consisting of directors who are not parties
         to the Proceeding ("disinterested directors"), or (ii) if such a quorum
         is not obtainable, by independent legal counsel in a written opinion,
         or (iii) even if such a quorum is obtainable, by independent legal
         counsel in a written opinion if the Board of Directors of the
         Corporation, by a majority vote of a quorum consisting of disinterested
         directors, so directs, or (iv) by the stockholders of the Corporation.
         Any such determination may be contested by Indemnified Party as
         hereinafter contemplated.
<PAGE>

                  (c) A failure to make any required determination within the
         period of time specified shall be deemed to be a determination
         favorable to the Indemnified Party.

         11.      ENFORCEMENT.

                  (a) The Corporation expressly confirms and agrees that it has
         entered into this Agreement and assumed the obligations imposed on the
         Corporation hereby and has obtained the approval of its Board of
         Directors to induce Indemnified Party to serve or continue serving as a
         director or an officer of Corporation and acknowledges that Indemnified
         Party is relying upon this Agreement in agreeing to serve or continue
         serving in such capacity.

                  (b) In the event Indemnified Party is required to bring any
         action to enforce rights or to collect moneys due under this Agreement,
         the Corporation shall reimburse Indemnified Party, on a continuing and
         current basis, for all of Indemnified Party's reasonable fees and
         expenses in bringing and pursuing such action and Indemnified Party
         shall have no obligation to reimburse the Corporation therefor unless
         Indemnified Party is not successful in such action after rendition of a
         final, non-appealable judgment by a court of competent jurisdiction.

                  (c) The right to indemnification hereunder shall be
         enforceable by Indemnified Party in any court of competent jurisdiction
         if Indemnified Party's claim therefor is denied, in whole or in part,
         in the manner provided herein, or if no disposition of such claim is
         made within 60 days from the receipt by the Corporation of Indemnified
         Party's request for indemnification hereunder.

         12.      SEVERABILITY. Each of the provisions of this Agreement is a
separate and distinct agreement and independent of the others so that if any
provision hereof shall be held to be invalid or unenforceable for any reason,
such invalidity or unenforceability shall not affect the validity or
enforceability of the other provisions hereof. To the extent necessary to
give effect to this Agreement, should any provision hereof be held invalid or
unenforceable, this Agreement shall be reformed in such a manner as to
provide the maximum indemnity contemplated hereby to Indemnified Party, it
being the intention of the parties hereto that this Agreement be otherwise
given its maximum effect consistent with the laws and, to the extent
applicable, public policies of the State of Delaware.

         13.      OBLIGATION TO AMEND. The Corporation agrees to take all
actions necessary to amend this Agreement in the future to increase or
otherwise maximize the indemnity protections intended to be afforded hereby
to the extent then permitted by law.

         14.      NOTICE. Any notice, request or other communication
hereunder to the Corporation or Indemnified Party shall be in writing and
delivered or sent by postage prepaid first class mail or by hand delivery or
express mail service or by facsimile transmission as follows: (a) if to the
Corporation, addressed to UroCor, Inc., 800 Research Parkway, Oklahoma City,
Oklahoma 73104, facsimile 405/290-4059, and (b) if to Indemnified Party, to
the address shown on the signature page hereof or to such other address as
Indemnified Party shall designate from time to time to the Corporation in
writing.

         15.      GOVERNING LAW; BINDING EFFECT; AMENDMENT AND TERMINATION.

                  (a) This Agreement shall be interpreted and enforced in
         accordance with the laws of the State of Delaware.

                  (b) This Agreement shall be binding upon Indemnified Party and
         upon the Corporation, its successors and assigns, and shall inure to
         the benefit of Indemnified Party, his or her heirs, personal
         representatives and assigns and to the benefit of the Corporation, its
         successors and assigns. The Corporation shall require any successor
         (whether direct or indirect, by purchase, merger, consolidation or
         otherwise) to all or any substantial part of the business or assets of
         the Corporation, by agreement in form and substance satisfactory to
         Indemnified Party, to expressly
<PAGE>

         assume and agree to perform this Agreement in the same manner and
         to the same extent that the Corporation would be required to
         perform it if no such succession had taken place. Failure of the
         Corporation to obtain such agreement prior to effectiveness of any
         succession shall be a breach of this Agreement and shall entitle
         Indemnified Party to appropriate equitable relief or monetary
         damages from the Corporation in an amount necessary to provide
         Indemnified Party with the protections to which he or she would be
         entitled hereunder. As used in this Agreement, the "Corporation"
         shall mean the Corporation as hereinbefore defined and any
         successor to its business or assets as aforesaid that executes and
         delivers the agreement provided for by this Section 15(b) or that
         otherwise becomes bound by all of the terms and provisions of this
         Agreement by operation of law.

                  (c) No amendment, modification, termination or cancellation of
         this Agreement shall be effective unless in writing signed by both
         parties hereto.

         16.      ENTIRE AGREEMENT. This Agreement constitutes the entire
agreement and understanding between the parties relating to the subject
matter hereof and supersedes all prior agreements between the parties
relating to the subject matter hereof.

     IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of
the day and year first above written.

                                  UroCor, Inc.

                                  By:_________________________________________
                                                           Name
                                                           Title

                                  [Name of Indemnified Party]

                                   -------------------------------------------
                                   Name of Indemnified

                                   Address:      Address
                                                 Address

                                   Facsimile:  Fax Number
<PAGE>

                                  SCHEDULE 10.1

                              INDEMNITY AGREEMENTS

CURRENT BOARD MEMBERS
         Herbert J. Conrad                           Louis M. Sherwood, M.D.
         Michael E. Herbert                          Aaron Beam, Jr.
         Thomas C. Ramey

CURRENT EMPLOYEES
         Michael W. George                           Bruce C. Hayden
         Karl K. Nigg                                John L. Armstrong, Jr.
         Robert W. Veltri, Ph.D.                     Lou Rye Carmichael
         Gerard O'Dowd                               Larry S. Compton

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00003-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00003-of-00352.parquet"}]]