From NBC Chicago

A Chicago teen was arrested and charged for the videotaped attack of an elderly man in April at the Chicago Avenue Red Line station.

Scotty Strahan, 18, of the 8600 S. Normal Ave. turned himself into Area 3 officers, police said, after authorities issued alerts seeking his arrest. Strahan was charged with aggravated battery to a transit passenger and battery in a public place.

Video posted at shows the elderly man in a tan jacket wandering around passengers on the CTA platform. In the video, a group of teens is seen laughing and taunting the older man. One teen, dressed in a black vest and hoodie, begins following the older man as the train approaches.

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The train lets off passengers, and the teen tries to get the older man’s attention. The two talk briefly before the teen suddenly punches the man in the head, knocking him to the ground on his back. The older man’s cap falls off in the blow and he’s left unconscious.

Some teens in the group laugh and board the train. One of them mimics the punch, and as the train pulls away, a woman is seen checking on the man and calling someone on her phone.

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