Nyleen Kay Marshall, a four-year-old girl, went missing on June 25, 1983, during a family picnic in Clancy, Montana. Despite extensive searches involving over 2,800 volunteers and search dogs, no signs of her were found. Witness reports indicated a man in a purple jogging suit was seen with her before her disappearance. Over the years, there have been several mysterious phone calls and letters relating to Nyleen's case, but no definitive leads have emerged. The case remains unsolved, leaving her family without closure.