The police aren't our courageous protectors and haven't been for decades. Their job is to make busts and to get home safely every night.
The Marine Corps, they are not.
Too bad the "Safety Monitor" didn't hand his pistol to a random student - they might have done some good.
The police did the same thing in the Cheshire CT murders. They waited outside the house and listened to the mother and her two daughters being raped, strangled and burned alive. That police department is well known for writing traffic tickets for even the slightest infraction. I guess they thought that was all their job required them to do.