A Kent man has been charged with second-degree assault for allegedly sucker-punching a Minnesota Vikings fan during a game last year at CenturyLink Field.

William D. Van Meveren, 34, was arrested after the Nov. 4, 2012, incident but was released pending further investigation. He was charged last week, say documents filed by the King County Prosecuting Attorney’s Office.

The victim, Ty Copp, 34, a Vikings fan, was reportedly engaged in “good-natured joking” with Seahawks fans seated nearby throughout the game, charging documents say. With the Seahawks ahead (the team would eventually win 30-20), Copp and his wife decided to leave early, the documents say.

The couple were leaving when someone “sucker-punched” Copp in the face, documents say. Copp fell and struck his head on the concrete, losing consciousness.

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Copp didn’t see the assailant, but several witnesses identified Van Meveren.

Copp suffered a broken nose, a concussion and possible nerve damage, the documents say. Van Meveren says he was walking down stairs at the stadium when a fist came toward his face, grazing his chin. He said he responded by punching the man in front of him, documents say.