The video shows an elderly man being punched in the face by a young man in December 2015.
The elderly man was getting ready to cross Rosa Parks Boulevard in Paterson.
A 16-year-old, who was heard in the video encouraging the aggressor, turned himself in to Paterson Police on Saturday evening. He is being charged with aggravated assault and endangering an injured victim.
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The 17-year-old attacker is still being sought by police.
Police Director Jerry Speziale released a video statement Friday on Facebook to the public about the video.
The condition of the victim is currently unknown.