Martin was last seen at her home in Lincoln, Illinois on June 2, 1976. Her husband was the last person to see her, before he left for work between 6:00 and 6:30 a. m. Martin was supposed to go to work at 9:00, but she never arrived and has never been heard from again. A witness saw her car driving northbound on U. S. 66 at 9:15 a. m. , but its driver could not be identified. Two days after her disappearance, her vehicle was found abandoned in the parking lot of the Holiday Inn in Bloomington, Illinois.