The Trail Went Cold – Episode 383 – Nyleen Kay Marshall

June 25, 1983. Jefferson County, Montana. While attending a picnic with her family in Helena National Forest, four-year old Nyleen Kay Marshall goes off to play with some other children until she vanishes without a trace. An extensive search of the forest fails to find her, but other kids report having seen an unidentified man in a jogging suit speaking to Nyleen shortly before she went missing. Over two years later, the authorities receive a series of anonymous letters and phone calls from a man who claims to be raising Nyleen, but he is never identified and Nyleen cannot be found. Was Nyleen Kay Marshall actually the victim of a stranger abduction and, if so, who was responsible? On this week’s episode of “The Trail Went Cold”, we explore a disturbing unsolved missing children’s case which has featured a number of surprising twists and turns these past four decades. If you have any information about this case, please contact the Jefferson County Sheriff’s Office at (406) 225-4075.

Join us on Saturday, June 15 at 8:00pm ET for an online streaming marathon where we will be watching classic segments from “Unsolved Mysteries”. You can enter our screening room by clicking on this link.

Additional Reading:

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“The Trail Went Cold” is going to be appearing on podcast row at Crimecon UK” in London on September 21-22, 2024. To get a 10 % discount on the purchase of tickets to either event, please use our specialized promo code, “COLD24”, by visiting or

“The Trail Went Cold” will be appearing at the True Crime Podcast Festival, taking place at the Denver Marriott Westminster in Colorado on July 12-14, 2024. To get a 15 % discount on tickets, please use our specialized promo code, “TRAIL”, by visiting

The Trail Went Cold is produced and edited by Magill Foote.

All music is composed by Vince Nitro.