Kinney was last seen in Osage, Oklahoma on June 23, 1976. She was last seen at Osage Laundromat, which her uncle owned. She has never been heard from again. After her disappearance, Kinney's purse and drink were found at the laundromat, as well as a donut which had been bitten into. A witness said she left the laundromat and got into a faded beige 1965 Plymouth with two women.

After her disappearance, there were several reported sightings of Kinney. She was supposedly traveling around southern Kansas with a religious group. Authorities were never able to confirm the sightings, however. Kinney is missing under suspicious circumstances and few details are available in her case. She was a high school cheerleader at the time of her disappearance.