Janitor invents door lock to stop active shooters

SIOUX FALLS, S.D. (KELO) — There have been a number of deadly school shootings across America, one of the latest was in Ulvade, Texas. But a janitor from Dakota Wesleyan University thinks he’s invented a device that could save lives and make him a rich man. When he’s not cleaning floor, DWU janitor Jeff Harris … Continue reading Janitor invents door lock to stop active shooters