WATERTOWN City police arrested Chad R. Backus, 31, of 697 LeRay St., after he kicked open the front door of his residence, striking an 8-year-old girl in the head, police said.
The incident occurred at 9:25 p.m. Monday, they said. The girl suffered a large swollen lump and discoloration on her forehead.
He was charged with endangering the welfare of a child and arrested at the residence about 20 minutes later.
He was arraigned in City Court and sent to the Metro-Jefferson Public Safety Building on $500 bail.