The CGIC is a collaborative mission that brings the CPD, the ATF, and other law enforcement agencies into the same room as prosecutors. They use evidence such as shell casings to find and charge the city's most violent criminals and repeat offenders.

The 41 arrests and 64 machine-gun conversion devices seized were the culmination of a two-month operation. The devices are linked to mass shootings.

At the ATF’s Crime Gun Intelligence Center, or CGIC, investigators examine every piece of evidence in detail. Sabrina Franza reports.