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.

Then he left to walk back to his dorm room. He says he saw an officer “jogging” toward the entrance of another building across the grounds from the building he’d just left.

Then this:

“I did not pay him any mind, and continued to walk back towards my room. I looked behind me, and noticed that the police officer was following me. He spoke into his shoulder-mounted radio and said, ‘I got him.’

“I faced forward again, presuming that the officer was not talking to me. I then heard him say, ‘Hey, turn around!’ — which I did.

 “The officer raised his gun at me, and told me to get on the ground.

“At this point, I stopped looking directly at the officer, and looked down towards the pavement. I dropped to my knees first, with my hands raised, then laid down on my stomach.

“The officer asked me what my name was. I gave him my name.

“The officer asked me what school I went to. I told him Yale University.

“At this point, the officer told me to get up.”

The officer gave his name, then asked my son to “give him a call the next day.”