Catching bad guys in the 21st century
In a quiet neighborhood somewhere near Miami, a man and his son are murdered while they sleep. Their home is ransacked and robbed. When Miami-Dade police arrive at the scene, the killer is gone, but the shell casings from his .22-caliber weapon are not. They lie on the floor near the victims, and police carefully collect each one.
Technicians at the Miami-Dade Police Crime Laboratory enter, or ďimage,Ē the shell casings into a ballistics imaging system provided by the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF). The system creates digital images of the shell casings, including the specific markings (microscopic scratches and dents) left on them by the shooterís weapon....