In respect to this, what can cause a false positive for gunshot residue?
A positive GSR test result does not necessarily mean that a defendant has fired a gun. Even if the fused particles of barium, antimony, and lead are found, they could have come from other materials, such as brake pads or fireworks, or they could be a result of a contaminated sample.
Similarly, are GSR tests reliable? Reputable scientists always have reported that the finding of GSR cannot indicate the shooter, yet members of the media usually seem surprised to learn that. Nevertheless, GSR findings continue to add value simply because numerous population studies have shown that GSR is not normally found on the average person.
Besides, are gunshot residue tests reliable?
Gunshot residue is composed largely of unburnt gunpowder, explosive primer and fragments of bullet or cartridge. The problems with the overall reliability of gunshot residue come not with the testing or identification of its particles, but more with the ease whereby it can be tampered with and altered.
What three elements are most diagnostic for gunshot residue?
The important components, the ones that examiners look for when testing for gunshot residue, are lead (Pb), barium (Ba), and antimony (Sb).
