Controversy still surrounds his death, due mainly to the fact of his longtime affair with Toni Mannix, the wife of MGM executive E.J. Mannix. Many of Reeves' friends and colleagues didn't believe that he had committed suicide but that his death was related to the Mannix situation. However, no credible evidence has ever been produced to support that contention...

On June 16, 1959, he was found shot to death at his home in Hollywood, California. To this day, there is still controversy over whether he killed himself or was murdered.

What raised eyebrows regarding Reeves' death is that he was found naked in his bedroom by his guests during a small gathering at 1:59 a.m.; his guests waited 45 minutes to call police; detectives found additional bullet holes in the floor of his bedroom; bruises were found on Reeves' body; shell casings were discovered in strange locations; and a jilted lover of an MGM executive and a volatile, overly- possessive fiancée also figured into the unhappy storyline. Forensic evidence and expert testimony, however, suggest non-criminal explanations for all or most of these seeming anomalies.

Personally defended Noel Neill when she replaced Phyllis Coates as Lois Lane in the second season of the Superman TV series when he felt the director was being too harsh with her. He also defended Robert Shayne, who played Inspector Henderson when Shayne was accused of being a radical during the 1950s witch hunt and was in danger of losing his job. Producer Whitney Ellsworth also defended Shayne along with Reeves...

https://www.imdb.com/name/nm0001660/?ref_=tt_cst_t_1