[USAF1985]

They just waited for the racket to die down, then walked outside with the crime scene tape...since they can’t pursue suspects anymore.

[Hiddigeigei]

"They just waited for the racket to die down..."
To be honest, if I were cop in the station and heard a barrage of what sounded like machine gun fire out front, I don't think I would be the first to pop out the front door to see what was happening.