When a gun is fired, a number of particles and gases are
discharged and deposited or condensed on all surfaces near the
weapon. According to Schwoeble and Exline, 2000 [1], most
Gunshot Residues from weapons, hereinafter GSR, leave the gun in
gaseous form after firing. Gradually the gas condenses and
individual particles settle near the gun, for example on the
shooter’s hands. The lifetime and morphology of these particles
depends on the weapon used and the ammunition calibre, under
normal shooting conditions [1]. These particles can disappear from
the hands after contact with other surfaces or liquids. It is
impossible to determine a general GSR particle settling time curve
after discharge. But the results of the experiments conducted by
Fojta´ s¡ek and Kmjec¡, 2005 [2] confirmed the assumption that the
particles remain in the air for a certain period of time after
shooting.