One of the most disgusting displays of police cowardice ever.
I.e., you should apologize to that officer. It was his superiors who screwed up, and that was a procedure issue coupled with moral, not physical cowardice by superior officers. They froze when faced with surprise.
BTW, I know someone who was an instructor at a teachers' college in Colorado at the time. They refused to let any of their students serve as student instructors at Columbine High School because its reputation was so bad. The superiors at his college felt Columbine High School was a bomb waiting to go off. It was a predicted-in-advance tragedy due entirely to wrongdoing by its administration.
Really bad high schools kill their students.