On this day, Aug. 2, 1976, 12-year-old Andrea Wilborn and her mom’s boyfriend Stan Farr were murdered in their $6 million mansion in Fort Worth, Texas. Wilborn’s mother, Priscilla Davis, the estranged wife of oil heir T. Cullen Davis, was also shot by the intruder.

T. Cullen Davis was charged with the murders. He hired defense attorney Racehorse Haynes. After one of the most expensive murder investigations and trials in Texas history, Davis was quickly found not guilty.