On Valentine’s Day 1940, Toni Jo Henry murdered traveling salesman Joseph Calloway in a Louisiana rice field. Desperate to free her husband, Claude “Cowboy” Henry, from a 50-year prison sentence, she and an accomplice robbed Calloway, stripped him, and shot him for his car and clothes. Instead of saving Cowboy, she became the only woman ever executed in Louisiana’s electric chair. This is a true story of obsessive love, deadly devotion, and a marriage that ended in murder.

From May 1918 to October of 1919, the Big Easy of New Orleans was the scene of a brutal serial killer. Targeting mostly Italian...