A 911 dispatch audio is shedding light on the death of The Real Housewives of Salt Lake City star Mary Cosby's son, Robert Cosby Jr. "Twenty-three-year-old male, not conscious, not breathing. One dose of Narcan given," the dispatcher said, according to audio obtained by Page Six on Wednesday, February 25. "Police have been called. Three units in route." Us Weekly reached out to the Salt Lake City Police Department for comment. News broke on Wednesday that Robert Jr. died at age 23. His cause of death has not been confirmed.