Tiwana was last seen in her hometown of Aiken, South Carolina on August 11, 1989. She resided with her parents in the Balltown area on Jack Jones Street near Highway 19. She was visiting relatives at the time of her disappearance. She became angry when her mother told her she must return to her home. She was last seen by two neighbors at approximately 5:30 p.m. at a Quik Stop convenience store a few blocks from home. She has never been seen or heard from again. Her case remains unsolved.