Mother and actress Naya Rivera is missing and presumably dead after authorities found her four-year-old son alone onboard a boat on Lake Piru. Naya had rented the pontoon boat early on Wednesday and her son was found later. Ventura County authorities began a drowning person's search around 1pm yesterday. Her son said that his mom had been swimming in the lake however she never returned on board. Naya and her former husband Ryan Dorsey welcomed their son back in 2015.