An autopsy report released on Friday revealed new details about the death of Glee actress Naya Rivera , who drowned in July while boating with her 4-year-old son on a California lake. The investigation from Ventura County Medical Examiner determined that the 33-year-old raised her arm and called for help when she accidentally drowned at Lake Piru northwest of Los Angeles, The Associated Press reported. According to the report, Rivera first helped her son, Josey, get back on the boat. The boy then “noticed the decedent put her arm up in the air and yelled ‘help,’” the autopsy stated. The actress "knew how to swim well," but she "disappeared into the water,” investigators concluded. The man who rented the pontoon boat to Rivera said he put a life vest aboard even though she declined the safety gear. Medical examiners said Rivera struggled with vertigo and a recent sinus infection. Drugs weren't found to be factors in her death. However, the toxicology report found a small amount of...