Is there a real danger of concealing gunshot residue (GSR) particles by skin debris using the tape-lift method for sampling GSR from hands?
Experiments were carried out to assess the danger of concealing GSR particles by skin debris using the tape-lift method for sampling GSR from hands. Thirty discrete spherical particles (from GSR and from the debris of oxygen cutting of steel) sized from 8 to 30 microns were mounted on a double-side adhesive coated stubs in known locations using a stereomicroscope. These stubs were then used for dabbing hands 50 times. Some of the particles or parts thereof were covered by skin flakes, however, all particles could be detected using the backscattered electron image (BEI) in the scanning electron microscope (SEM). Also, all could be identified by the energy dispersive X-ray spectroscopy (EDX).
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Division of Identification and Forensic Science, Israel Police National Headquarters, Jerusalem.
D005389:Firearms; D005554:Forensic Medicine / Q000379:methods*; D006225:Hand; D006801:Humans; D007557:Israel; D008855:Microscopy, Electron, Scanning; D012867:Skin / Q000737:chemistry*; D013232:Steel
D013232:Steel