Cynthia Cindi Dawn Kinney was 16 when she vanished from Pawhuska, Oklahoma, on June 23, 1976. She worked at the Osage Laundromat on Main Street, owned by her aunt and uncle, and was last seen leaving the business around 9:30 a.m. Witnesses saw her get into a faded beige 1965 Plymouth Belvedere; accounts differ on occupants, with some describing two women and others a man and a woman. Her purse, a half-eaten donut, and a drink were left behind in the laundromat.

Early leads produced few results. Unconfirmed sightings placed her in southern Kansas and with a religious group, but none were verified. In 1991 a witness said they had seen Cindi with Hobart Jess Punch Green before she disappeared; Green was a convicted murderer, though it is unclear whether investigators ever placed him with Cindi that day. Decades later, in 2023, Dennis Rader was identified as a person of interest after journal entries and an old word puzzle contained references interpreted as Cindy, Kinney, and Osage; Rader has denied involvement and prosecutors say evidence is insufficient to charge.

The case remains open and unresolved. If anyone knew Cindi, remembers the beige Plymouth Belvedere, or has information about her movements that morning, please come forward.