This is the story of the unsolved death of Mabel Greenwood; who killed her, and why no one knows what really happened 100 years later. The prime suspect in the case? Harold Greenwood, her husband of more than 20 years, was arrested on June 17, 1920, accused of fatally poisoning her. Let's look at what happened, the messy trial, and the one detail that got Harold acquitted. 

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