This is extremely disturbing, as I suspect this officer is a psychopath. He has probably figured out this sleeper hold and wanted someone to try it out on.
On these grounds alone he should have a psychiatric ban on being an LEO. Just firing him isn’t enough, as police departments around the US should know not to hire him, as he is a dangerous, potentially homicidal risk.
He is envious that the college kids are getting what he never got.