He was finally committed

Sadly...he was institutionalized.

He was here as recently as yesterday. I'm sure we will see him again soon, not that we need to.

His parents dropped him on his head.

He was moved to ward isolation with no wifi

As they were hauling him off in a straight jacket he was screaming  something about his parents not being mentally ill. 

He is still cross-posting.

They put him in an insane asylum, (finally!).

He's been committed