Nashville police have released surveillance video showing the shooter arriving at a private Christian school before unleashing terror in an attack that left six people, including three children, dead Monday. Around 10 minutes later, the surveillance video from inside the school captures the glass in a set of doors shattering before the shooter, wearing a vest, camouflage pants and a red baseball cap turned backward, climbs through one of the door frames. The shooter might have targeted the school, but Drake did not say whether police believed any specific people were being targeted