Langs was last seen in Elkhart, Indiana sometime during November 1973. She worked a full day that day, and then disappeared afterwards. Her parents last saw her when she ate breakfast with them at their home. She has never been heard from again.

Gerald "Jerry" Libertowski, who had dated Langs, was charged with her murder in 1976. He was also charged with the murder of another ex-girlfriend, Janis Sanders, who disappeared in 1975 and was never located. Sanders's wallet and a pill bottle belonging to Langs were discovered hidden in the foundation of Libertowski's house after the women's disappearances.

Libertowski always maintained his innocence and implicated another woman in Langs's death. He says he witnessed this person bury Langs alive, but he did not tell police at the time because he was afraid. He was acquitted of Langs's murder, and there was not enough evidence to prosecute him in Sanders's presumed death. Authorities continue to believe Libertowski was involved in Langs's disappearance. Foul play is suspected in her case due to the circumstances involved.