General Daniel Sickles and the Birth of the Insanity Defense

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Civil War general and politician Daniel Sickles was one of the most notorious figures of the 19th century. His life was marked by ambition, scandal, and a murder trial that stunned the nation.

After killing his wife’s lover in Washington, D.C., Sickles became the first American to successfully argue temporary insanity as a legal defense, setting a precedent that still echoes in courtrooms today. Firearms historian and regular contributor to Our American Stories, Ashley Hlebinsky, shares the remarkable story of a man whose personal chaos left a permanent mark on American law.