Former NYPD detective James M. Gannalo is a forensic firearms consultant, firearms and ballistics expert witness and President of Stria Consulting Group. Here he describes aspects of firearms identification:
3) Laser Trajectory Analysis of Bullet Paths – use of a portable scientific laser and inclinometer to determine the direction and angle of a bullet’s flight. This method is also used to accurately determine the origin of a gunshot.
4) Gunshot Residue Distance Determination – creating and analyzing test specimens to illustrate the approximate distance a firearm was discharged from an individual. This test can produce crucial evidence when assessing the validity of witness statements.