William J. Helmer Jr.

Former FBI agent

About William

William J. Helmer Jr. is a former FBI agent who worked on the St. Valentine's Day Massacre case. He is a veteran of the FBI and has written extensively on law enforcement and true crime topics.

Associated Podcasts

Autumn's Oddities

Guest

Key Topics

true crime

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Recent Appearances

The St. Valentine's Day Massacre

Autumn's Oddities•Feb 13, 2024•54:21•guest