Snarky Oracle!
Telly Talk Supreme
The whole idea sounds fascinating and like something out of Lana's 60s melodramas. BUT, for it to be true, Lana would have to have some help from the studios and LAPD, which I don't think was possible in 1958. Remember, Lana left MGM in 1955 and was a free agent for the next couple of years, until she teamed up with Ross Hunter over at Universal in 1959. So in 1958, Lana was pretty much on her own, her career in a slump, without a huge studio behind her and its PR machine and powerful executives who indeed were capable of covering up murders, rapes and all sorts of crimes. It is well known that this kind of stuff was done, mostly in 1930s and 1940s, during the heyday of the studio system. MGM was probably the best at it, (they even had their own police station on the lot) with Eddie Mannix, The Fixer, doing most of the dirty work. Another rumor is that he knocked off Superman actor George Reeves who had an affair with his wife. So if Lana had a scandal like this in 1940s, or early 1950s, she would have a whole machinery working for her.
That said, it is possible Lana still had connections and influence at her old studio and that Mannix, or someone else, would help her out even after she left them. I guess we'll never know.... If she really got away with a murder, than she also orchestrated a brilliant comeback, with Peyton Place become a huge hit after the scandal and with its climax trial scene which had Lana sobbing in the witness stand, just like in real life. Only in Hollywood!
I understand your point, but even though Lana was a free agent by 1958, the industry still has image to maintain, and Turner had been one of their biggest stars. So wheels still turn.
All of Hollywood knew how pathological Joan Crawford's domestic behavior had been, and even hubby Alfred Steele's 1956 death seemed suspicious to some, but there were barely any peeps about any of this in the media of the time, and Joan had been independent from the early-'50s.
The industry doesn't really want their greatest movie queens smeared -- let alone charged with murder, because it reflects badly on the business... and, besides, the Turners and the Crawfords, and their pals, likely know where the others' bodies are buried. Or might.
So people don't want to go over and down like dominoes.