School killer's trick to shoot more pals

Posed as cop to lure pupils into trap

- CHRISTOPHER BUCKTIN

PUPILS locked in their class watch the door in fear as a gunman who killed four teens in a shooting rampage tries to trick them into leaving.

The shooter, armed with a semi-automatic handgun, pretended to be a police officer, shouting: “Sheriff's office. You can come out."

In the footage from inside the classroom, one of the students says: “He said it's safe to come out"

But their teacher says: “We're not taking that risk.” The shooter then shouts back something inaudible before calling a student “bro", giving himself away.