Joan Robinson was a Houston socialite who had been adopted by an oil tycoon and his wife when Joan was just a baby. She grew up and married plastic surgeon John Hill, however when Joan became incredibly ill and passed away on March 19, 1969, some speculated that John could have been involved. But in another twist, John Hill himself was gunned down on Sept 24, 1972, prior to being able to stand trial for Joan’s death. This also left many speculating that John’s death could have been revenge for Joan’s death...   

Sources: 

SI Staff, “JOAN ROBINSON HILL AND BELOVED BELINDA”, Sports Illustrated Vault, June 29, 1959, https://vault.si.com/vault/1959/06/29/joan-robinson-hill-and-beloved-belinda, accessed Sept 14, 2025.  

Grey, Orrin, “Murder in Texas: The Strange Death of Joan Robinson Hill”, TheLineUp.com, Jan 25, 2024,  https://the-line-up.com/murder-in-texas-the-strange-death-of-joan-robinson-hill, accessed Sept 19, 2025. 

Neumann, Sean, “A Texas Socialite Died Mysteriously. Did Her Powerful Father Take Justice into His Own Hands?”, People, Feb 22, 2025, https://people.com/joan-robinson-hill-texas-socialite-died-mysteriously-11683595, accessed Sept 19, 2025. 

Goddard, Glenda, “Joan Robinson Hill and Her Bad Marriage to Dr. John Hill”, Hub Pages, Oct 31, 2023,  https://discover.hubpages.com/entertainment/Prescription-Murder-The-Tragic-Story-of-a-Murder-in-Texas, accessed Sept 19, 2025.