A novel technique has been solving cold cases all over the country - all without a single drop of DNA. What's genius about this crime-solving method is that it only costs $2, and is paid by the criminals themselves.

Join investigative journalist and true crime author of 46 books M. William Phelps as he explores how "the deck" of cold case playing cards inmates use in prison has led to the resolution of murder and missing person cases nationwide.*

*This episode includes producer Cristina Everett, who no longer works on the show. 

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