BOSTON (CBS) – The man accused of attacking a Boston Public Library employee outside the building now claims he’s the victim.

Police say 49-year-old William Zaniboni became belligerent in the library’s computer section Wednesday night.

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When an employee asked him to leave, Zaniboni allegedly told him he’d be waiting outside.

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William Zaniboni in court (WBZ-TV)

Police say Zaniboni made good on that threat, and when the victim left, Zaniboni punched him.

WBZ spoke with the suspect outside court – and he says police have it all wrong. “I was outside – I didn’t say anything about waiting outside for him I was outside,” Zaniboni said. “The guy came out and he tackled me to the ground. And as he’s wrestling me to the ground he had my head on the ground.”

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The victim also told police Zaniboni sprayed him with Mace, but police could not find any can of Mace when they arrested him.