In a forensic science lab, what does a fourier transform infrared spectrometer and a fume gard chemical hoods used for?

Fourier Transform Infrared Spectrophotometer
(FTIR)

An FTIR is used to detect specified compounds and
their quantities in a specimen.  It can be used for detecting both organic and inorganic
chemicals.  This instrument is valuable to forensic scientists for discovering compounds
you can't see with he naked eye on evidence.  Its sensitivity and versatility is of
great importance to forensic scientists for discovering compounds from evidence such as
blood, paints, polymer coatings, drugs, and organic/inorganic
contaminants.

Chemical Fume
Hoods

These are important to forensic scientists as a means
of protecting them, the product/experiment, and/or the environment from hazardous or
noxious fumes, vapours or dusts.  They ventilate the air instead the fume hood and
either expel it or recirculate the cleaned air back into the
room.