NORTH TONAWANDA, N.Y. — Police in New York say they’ve pulled the body of a former assistant U.S. attorney from a river.

For nearly three decades, George Burgasser worked as a federal prosecutor in Buffalo and Washington before retiring. Police found his body in the Niagara River Sunday night.

North Tonawanda Detective Capt. Thomas Krantz says the 62-year-old Burgasser was last seen on his son’s boat showing it to a group of friends. Police say Burgasser and his son stuck around the boat and he later fell into the water while he was alone.

Police say his son didn’t know what happened at first, and that Burgasser was in the water for at least 30 minutes.

Krantz says it appears to be an accident, but police are still investigating.