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MARQUETTE -- The man accused of threatening a nurse with a knife at Marquette General Hospital entered a not guilty plea on Friday.

Forty-eight-year-old Robert Allan Wallace appeared in Marquette County Circuit Court.

He pled not guilty to carrying a concealed weapon and felonious assault.

Earlier this month Wallace threatened a nurse with a butcher knife in the emergency room. If convicted, Wallace could face up to five years in prison.