13-year-old Yara Gambirasio went missing in Italy one night after walking to a gym less than half a mile from her house. Her body was found three months later in a field just a few miles away. Investigators found male DNA on her body but couldn’t find a match.

Join Mike and Gibby as they discuss Massimo Bossetti. The police were determined to find Yara's killer, and they began the most extensive DNA testing program in Italian history. It took three years and almost 20,000 DNA samples, but they eventually found Yara’s killer. But, it was the way they did it that makes this case so fascinating. They didn't get a hit from a database. They started with familial DNA and had to wade through the history of an affair that shook multiple families to the core.

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