Actress Naya Rivera is presumed dead after disappearing at Lake Piru in Ventura County, California on Wednesday. The search and rescue effort has been shifted to a recovery mission. Officials say it might impossible to retrieve her body because the underwater plant life complicates the search and makes it unsafe for divers. Police released video that shows Rivera and her four-year-old son, Josey, headed out on rented pontoon boat. Hours later, the vessel was found drifting at the north end of the lake - and little Josey was found aboard alone. Josey, is with his father, Ryan Dorsey.