Martin was last seen at approximately 3:00 p.m. in the Lemmon Valley area of Reno, Nevada on June 28, 1987. She made a purchase at a 7-11 convenience store and disappeared while walking away from the business towards her home a short distance away. Martin has never been heard from again.

A defrocked priest named Stephen Kiesle became a suspect in Martin's case in mid-2002. He has since been arrested and charged with molesting three girls at the Santa Paula Catholic Church in Fremont, where he worked from 1968 to 1971. Police searched his yard three times, using cadaver-sniffing dogs, radar, and a backhoe. They were looking not only for evidence in Martin's disappearance but also evidence in the disappearances of Jaycee Dugard, Amber Swartz-Garcia and Anthony Franko. The only item that was located was a bag full of dirt and decomposed clothing. The searches concluded in July 2002.

Martin's case remains unsolved. She is missing under suspicious circumstances and is believed to have been abducted. Her sister thinks she is deceased.