Which unit of the crime lab specializes in ballistic testing?

The specialization of the crime lab that focuses on ballistic testing is indeed the Firearms Unit. This unit is dedicated to the examination of firearms, ammunition, and ballistic evidence. Technicians in this unit conduct assessments to determine the function and performance of weapons, analyze bullet impacts, and match projectiles to specific firearms. They may also investigate gunshot residue and perform comparative analysis between bullets and cartridge cases.

The other units, while essential to criminal investigations, focus on different forms of evidence. The DNA Unit deals with biological samples and identifying individuals based on their genetic material. The Explosive Unit specializes in the investigation of explosive devices and materials. The Chemistry Unit analyzes various substances, often for chemical composition or toxicology, but does not primarily focus on firearms or ballistic evidence. This distinction clarifies why the Firearms Unit is the correct choice for handling ballistic testing.