Debra Stewart was last seen leaving her job at Sears in South Austin on May 21, 1976. Stewart, a communications student, lived in an apartment in the 2700 block of Manor Road. She supposedly left Sears to go see a doctor because she hadn't been feeling well. She had a chronic kidney condition. Her abandoned car was found two days later, with the keys in the ignition. No signs of foul play were found in her car or apartment. Investigators searched in several states. Her parents hired a private detective, who was unable to turn up additional clues. Foul Play Possible.