When an infant's body washes up on the shores of Deer Island, Massachusetts, residents rally to find out who she is, and what happened to her. Their unprecedented solidarity gets nationwide attention, helping police solve a heartbreaking mystery.

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On February 14th, 1929, one of the most shocking murders in mob history goes down in Chicago... and becomes known as the Valentine’s Day Massacre. The 20s and 30s are full of gangland murders, but the Valentine’s Day Massacre is considered the most brutal, and the toughest to solve. So who carried out the Valentine’s Day Massacre? And why?

Thank you to our experts who contributed to this episode: Clarence Goodman, Claire White, Natalia Mehlman Petrzela, Mike King, Cheryl Dorsey, and Larry Dale Gragg.

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The quiet Sarasota neighborhood of Mirror Lake wakes up to a nightmare when a neighbor is found strangled to death. Detectives believe it's the result of a long-held grudge against the silver tongued car salesman, but they turn out to be dead wrong.

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