Charles Blow:

Saturday evening, I got a call that no parent wants to get. It was my son calling from college — he’s a third-year student at Yale. He had been accosted by a campus police officer, at gunpoint!

This is how my son remembers it:

He left for the library around 5:45 p.m. to check the status of a book he had requested. The book hadn’t arrived yet, but since he was there he put in a request for some multimedia equipment for a project he was working on.