To determine if a suspect has recently fired a gun, gunpowder residue can be removed from the suspect's hand with a paraffin cast, which is analyzed by a new crime fighting technique called neutron activation analysis, no location, 9/8/1964. (Photo by General Dynamics/United States Information Agency/RBM Vintage Images)

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Photo credit: © RBM Vintage Images / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: activation, analysis, crime, dynamics, fighting, general, gun, hands, laboratory, neutron, paraffin, powder, residue, technique, test, wax