The Coast Guard suspended its search early Tuesday afternoon for a missing 25-year-old boater who was thrown into the Magothy River Monday from a 17-foot skiff and is believed dead, while other agencies pressed on.

"This is an important service that we provide … it gives closure to the families," said Sgt. Art Windemuth, spokesman for the Maryland Department of Natural Resources, which is leading the investigation.

Windemuth expected rescuers, which included the Anne Arundel County Fire Department and the Maryland State Police, to continue searching "throughout the day" despite the Coast Guard's departure.

James Robert Kane, of Pasadena, and a friend were tossed from the vessel about 4:30 p.m., after Kane likely made an erratic turn, Windemuth said. The friend, who has not been identified, was rescued uninjured. Kane is not expected to have survived.

He was not wearing a life jacket, Coast Guard Petty Officer Brandyn Hill said Monday night. The Coast Guard suspended its efforts at 12:08 p.m. Tuesday "pending further developments," a statement said, after 14 hours of searching a 12-square-mile area on Monday and Tuesday.

Searchers from multiple agencies worked into the night Monday, using a helicopter, divers and side scan sonar technology. They renewed their efforts early Tuesday morning.

Baltimore Sun reporter Liz F. Kay contributed to this article.

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