Frank Hilley long suffered from a mysterious illness before passing in May 1975. But years later, his daughter going through the same symptoms aroused suspicion, with the roads leading to Audrey Marie Hilley, Frank’s wife. Investigation Discovery’s ‘American Monster: Alabama Murder Mystery’ delves into a story that had numerous twists. From poisoning and faking a … Continue reading Frank Hilley Murder: How Did Audrey Marie Hilley Die? Is Carol Hilley Still Alive?