Kate Warne, a pioneering figure in the field of private investigation, is best known as the first female detective in the United States. She was hired by Allan Pinkerton, the founder of the Pinkerton National Detective Agency, in 1856.

This week Annie tells us about the case she and her fellow detectives solved in "Atkinson" Mississippi, involving the murder of bank teller George Gordon and a $130,000 theft. George's body was found in the morning, the detectives are certain: the victim must have known the killer!

Learn all about the time Allan Pinkerton used a ghost to get a confession.