Real life CSI at LAPD firearms analysis unit

LAPD officer Manuel Tarango uses a microscope to look at a .380 bullet shell casing at the Hertzberg-Davis Forensic Science Center/LA Regional Loboratory. The shell casing comes from the gun of a suspect in a shooting in the Valley.

Rachel takes us into the offices of the LAPD's ballistics unit for a story about how cops piece together bullet fragments and shell casings found on the streets to the people responsible for pulling the trigger.

She writes that the unit is the backbone of law enforcement and can make or break cases.

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