There is a growing concern for police: Glock switches. It's the size of a Lego — but it can take dozens of lives in a matter of seconds. These switches can turn a simple handgun into a weapon that can unload an entire magazine with one pull of the trigger, and we're seeing them being used in South Bend. Local leaders are laying down the law on the devices, issuing a warning for those looking to get one. A "Glock switch" is a little device that carries a massive, deadly impact.