Kathleen Lanigan, 50, of Oak Avenue, is charged with second-degree assault and second-degree breach of the peace.
Police said Lanigan stabbed her boyfriend during an argument. He was not seriously injured, police said.
She was arrested Feb. 13 at 1:20 a.m. and she appeared in Derby Superior Court Feb. 13.
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Her next court date is March 7 and she is free on a written promise to appear in court.
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