Video captures Naya Rivera with her son at dock before she disappeared

"Glee" actress Naya Rivera is presumed dead after disappearing at a lake in Southern California.This is a security video of Rivera and her 4-year-old son renting a pontoon boat at Lake Piru on Wednesday afternoon.Officials say that about three hours later, another boater discovered the child onboard, asleep and alone.Authorities say the child had a life vest on and an adult life vest was found on the boat.The child is healthy and with family.Rivera played Santana Lopez on the Fox show for six y