McClure was last seen in King County, Washington on November 2, 1978. She and a coworker went to the Fandango Disco, which was inside the Sir Loin Inn at the Lake Forest Park Shopping Center, and met other friends there. McClure had an argument with the coworker and decided to walk home, although her friends offered to give her a ride. Her residence was five miles away. She was last seen walking in the 16500 block of Bothell Way northwest. She has never been heard from again.

McClure's roommate reported her missing the next day. She was carrying a brown cloth purse with a shoulder strap at the time of her disappearance. On November 8, her driver's license was found near the intersection of Interstate 5 and Interstate 405. No other clues were located, however. Few details are available in McClure's case.