Multiple rescue crews, including the Vermont State Scuba Team, are continuing their search for a New York man who is presumed dead after he dove into Lake Champlain on Tuesday and never surfaced.

Vermont State Police have identified the missing swimmer as Dennis Rabideau, 52, of Mooers Forks, New York. Investigators said Rabideau was with four other adults on a boat that departed Tuesday afternoon from Chazy, New York.

When the boat was near Alburgh Dunes State Park, Rabideau jumped into the water to go swimming.

Police are interviewing witnesses to gather more information. Rescue crews spent hours Tuesday night searching for Rabideau in an area near the park.