The Baltimore City Detention Center has been the center of scandal–with gangs accused of running the place and using cell phones to carry out their crimes. Friday, corrections officials demonstrated new technology that they claim shuts that down. Mike Hellgren was inside the facility and shows you how it works. This has been a problem for years. The new system only targets cell phones inside jail walls.

This is a rare look inside the walls of what was once, perhaps, the most troubled correctional facility in the state. The Baltimore Detention Center was a playground for powerful and dangerous gang leaders who would use cell phones to run drug operations and silence witnesses.

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