4-year-old said mom pushed him onto boat, then disappeared
                                
                                
                                    (Newser) -
                                    Naya Rivera's last act was to save her son, according to police. Ventura County Sheriff Bill Ayub described the Glee actress' final moments, as recounted by her 4-year-old son, at a press conference Monday afternoon, shortly after a body believed to be Rivera's was found at California's...