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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Two former California cops go into business in the City of Angels' sleazy adult entertainment industry. But their partnership ends in a murder and a plot twist worthy of a Hollywood script.

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