Flippo was last seen in Huntsville, Alabama on June 24, 2000. He was riding in his vehicle at the time, accompanied by a long-haired man wearing a baseball cap. Flippo has never been heard from again. He was reported missing five days later, on June 29, the same day his vehicle was found.

Foul play is suspected in Flippo's disappearance; authorities believe he was murdered and buried somewhere in southern Madison County, Alabama. No one has been charged in his case. He resided in Old Gurley Pike, Alabama in 2000.