Black powder
Development of Microscopical Methods for the Systematic Analysis of Chemically Reacted, Improvised Low Explosives and Related Residues
IDENTIFICATION OF LOW EXPLOSIVES AND THEIR POST-BLAST RESIDUES VIA GAS CHROMATOGRAPHY (GC) COUPLED WITH VACUUM ULTRAVIOLET (VUV) SPECTROSCOPY
Smokeless Powder Reference Collection and SWGFEX Smokeless Powders Database Expansion
How Reliable Are Latent Fingerprint Examiners?
How Reliable Are Latent Fingerprint Examiners?
Brian Cerchiai discusses a NIJ-supported a study conducted by the Miami-Dade Police Department on the accuracy of fingerprint examiners. The study found that fingerprint examiners make extremely few errors. Even when examiners did not get an independent second opinion about their decisions, they were remarkably accurate. But when decisions were verified by an independent reviewers, examiners had a 0% false positive, or incorrect identification, rate and a 3% false negative, or missed identification, rate.
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