The Trace Evidence Laboratory offers services involving the two forensic sub-disciplines of Gunshot Residue Analysis and Fire Debris Analysis.
Gunshot residue analysis is performed utilizing Scanning Electron Microscopy/Energy Dispersive Spectrometry (SEM/EDS). The micron-sized particles from the discharge of a vast majority of ammunition primers can be identified by the presence of lead, barium, and antimony.
The laboratory also offers the analysis of fire debris samples for the presence of ignitable liquid residues. Samples of debris from suspicious fires are submitted and analyzed by chemists for the presence of gasoline, petroleum distillates, and a wide-ranging variety of other ignitable liquids. The analysis is performed with gas chromatography with mass-selective detection. Two members of the staff are board certified by the American Board of Criminalistics.
The Trace Evidence Collection Team closely examines bodies and collects trace evidence such as hairs, fibers, glass, biological stains, and other evidence that may be useful in the investigation of a crime. The team uses an alternate light source (ALS) for locating trace evidence. The ALS is particularly useful in identifying biological stains, bruises, and bite marks.