The Brattleboro daily reformer. (Brattleboro, Vt.) 1913-1955, 1922-09-18
TRACE CRIMINALS
BY AIR ANALYSIS
French Police Have New
and Certain Method of
Detecting Criminals
ANY EXPECTORATION
IS SURE GIVE AWAY

Even Detects Clothes Criminal Wears -
SpectrOscope Detects Light Radiating
from any PersOn-AlsO Reveals His
State OF Excitement.
PARIS. Sept 1S.-Analysis of the
air breathed by criminal is the newest
aid to the French police in identifying
malefactors. They scientifically ex-
anime the air in the room in which he
operated, then they examine the man,
and reach a definite answer to the ques-
ton whether he breathed in that room
at q particular time. If. by chance the
man expectorated while at work, he can
be traced as surely as if he had left his
calling card.
The machine which does this is part
of a crime detcctor system which is
based on science applied to the detec-
ton and identification of criminals. If
the Paris police wish to show that a man
was at q given place at a given hour,
thew do not spend days trying to find
witnesses. They prove it by the air he
breathed; by the clothes he wore, and
by several other scientific records which
they say cannot be denied. There is no
room for doubt. they sa-. such is their
confidence in the accuracy of their de-
auctions.
When a crime has been committed
the scientists. in their well-equipped
laboratory, are notified. They crowd
into big automobile. filed with scien-
tific instruments. and proceed to the
scene. There is the expert pho
tographer: the artist to make sketches;
the chemist. and the man to operate
the spectroscope. The aforementioned
takes a section of the air for future
careful analvsis:~ each of the others
does his assigned part. and no. possible
bit of material analysis Is overlooked.
The floor and the walls. the furniture;
threads of clothing; bloody rags;
broken lights .hnser-prints' anything
that offers n possible suggestion Is packed
up i'm air-tight receptacles and taken back
TO the laboratory. Here everything IL
analyzed. and finally. the laboratory Is
| able to give instructions to the detective
whom to arrest and what to look for, so
! that final and definite comparisons may
! be made.
When we appear in court we do not
| confront the prisoners and the judges
: with suppoSitions or probabilities, said
, NJ. Bell, chief of the laboratory. I'VE
present proofs and facts. We explain
| exactly how the crime was committed
! In lilo cases of crime 1917 imprints
were made requiring 101.6l6 examiua
tons and 4.775 Photographic prints. and
| this work led to the positive Identified
! ton IF 1928 cFiniRals. Criminals wht
! wash up blood stains now waste then
! time. In this Iabora tory blood diluted
/ 200. 600 times can be traced whether the
original stain was on q floor or a bit o
! cloth"
Each man or woman has his or hel
| distinctive heat and inns is why blood
! hounds are able To trace by SMELL con
! tinued the speaker The spcctrOscopt
can be made to detect the light radiatins
from a given person. and If that person
as passed through a room, unseen, at
given moment this fact the machine vii
! reveal The fact that the person in ques
ton was in IA state Of excitement or no
also will be recorded.