Authorities are searching for a man who punched a school crossing guard outside a Pennsylvania elementary school, knocked her unconscious, and then ran away.
The incident happened on March 16 outside Walnut Street Elementary School in Darby.
Surveillance video outside shows a couple of school buses on the street that afternoon and a female crossing guard walking from the street onto the sidewalk.
Out of nowhere, a man in a black sweatsuit starts chasing her down the block, grabs her, then clocks her in the face. As the victim falls to the ground from the force of the punch, the culprit runs away…