Answer
Found in 2001, the O'Hair family's remains were discovered buried underground at their remote family farm in Texas, after the arrest and conviction of their murderer, David Koresh, leader of the Branch Davidian religious sect. Koresh had been responsible for a 51-day standoff with the FBI at their Waco compound in 1993, resulting in the deaths of over 80 people, including the O'Hair family members.