Abstract:
:Suspects in shooting investigations in Chicago are routinely transported in department vehicles and detained in department facilities prior to gunshot residue (GSR) evidence collection. The GSR test results are used to associate the suspect with primary exposure to GSR. The potential for these vehicles and facilities being sources of secondary GSR contamination needed to be determined. A total of 201 samples were collected from randomly selected vehicles and detention facilities. The sampling collected trace materials from surfaces that suspects' hands may contact during the arrest process. These samples were examined for the presence of GSR particles using scanning electron microscopy. Upon completion of the automated analysis, those particles that met an initial GSR screening criterion were relocated and reanalyzed. The locations where GSR particles were recovered allowed us to make recommendations to the Chicago Police Department with regard to transporting and detaining these suspects. The low number of GSR particles recovered suggests that the potential for secondary contamination, although present, is relatively low.
journal_name
J Forensic Scijournal_title
Journal of forensic sciencesauthors
Berk RE,Rochowicz SA,Wong M,Kopina MAdoi
10.1111/j.1556-4029.2007.00457.xsubject
Has Abstractpub_date
2007-07-01 00:00:00pages
838-41issue
4eissn
0022-1198issn
1556-4029pii
JFO457journal_volume
52pub_type
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