Robert Cosby Jr @mary_m_cosby/Instagram Share on Facebook Share on X Google Preferred Share to Flipboard Show additional share options Share on LinkedIn Share on Pinterest Share on Reddit Share on Tumblr Share on Whats App Send an Email Print the Article Post a Comment Robert Cosby Jr., the son of The Real Housewives of Salt Lake City star Mary Cosby, has died. He was 23. The Salt Lake City police department confirmed his death with The Hollywood Reporter. On Monday, police responded to an overdose call at approximately 6:14 p.m., noting that it then became a death investigation.