Several stars from the Bravo universe are mourning the death of The Real Housewives of Salt Lake City star Mary Cosby's son, Robert Cosby Jr. News broke on Wednesday, February 25, that Robert Jr. died at age 23. TMZ reported that he died in Utah following a possible overdose. His cause of death has not been confirmed. Authorities confirmed to Us Weekly that they responded to a call on Monday, February 23, for a "full arrest" and "medical emergency." They discovered Robert Jr. dead on arrival. A death investigation is open and active.