Teen arrested in sucker-punching of Pa. teacher

City schools spokeswoman Ebony Pugh said the school system can't take any formal action against the suspect because the attack happened off school grounds and after the school day had ended.

The suspect attends a school for troubled youths in another part of the city. Police said there's no evidence the suspect, or his friends, knew Addlespurger or exchanged words with him.

Addlespurger didn't immediately return a call for comment, but has said on Facebook and in brief comments to reporters that he's recovering and that "the video pretty much speaks for itself."