Debra Lee Frost was 17 when she disappeared from Salt Lake City on July 9, 1984. She was last seen at the Mountain Bell Plaza, where her boyfriend worked, and told someone that evening she planned to walk or hitchhike home to Montgomery Street. She never arrived and none of her friends or family heard from her afterward.

Described as a habitual hitchhiker who had run away before but always stayed with friends, Debra may have been in Rock Springs, Wyoming, 12 days after she vanished, according to a 2012 report. Those records have been destroyed, but it is believed she may have been traveling with Fred Martinez, a man she knew. Martinez, who died by suicide in 1995, was said to have joked once about killing her and had an unreciprocated romantic interest; authorities have not named him as a suspect.

Her family, including brother Frank Frost, continues to seek answers. Does anyone have information about Debra’s movements in July 1984 or about contacts with Fred Martinez around that time?