Glee star Naya Rivera's cause of death has been confirmed as accidental drowning after her body was recovered from Lake Piru on Monday, 13 July.The 33 year old’s cause of death has been ruled as an accident by the medical examiner's office. Naya had been enjoying a day out on the lake on 8 July with her four year old son Josey, before she went missing and was presumed dead.