The US Coast Guard and local agencies are searching for a missing Slidell man in the water near Empire. Mark Matherne was listed by the Coast Guard Sector New Orleans as missing after a report at approximately 1:30 p.m. of a sunken vessel. Officials say Matherne’s boat was found sunk in the vicinity of Shell Island Bay. Multiple crews were dispatched in the search including a MH-65 Dolphin Helicopter, Coast Guard boats, and assets from Louisiana Department of Wildlife and Fisheries and the Plaquemines Parish Sheriff’s Office. If anyone has any information please contact the Sector New Orleans command center at (504) 365-2544.