Police have arrested a man charged in the killing of an infant in Biddeford last year.

The 5-week-old boy died in the hospital in June of 2024 after he was found unresponsive at a home on Emery St.

Police arrested 36-year-old Christopher Knapp of Biddeford on Tuesday night and charged him with manslaughter.

He pleaded not guilty on Thursday and is being held in jail in lieu of $175,000 cash bail.

The child’s cause of death has not been released.