Smith was the English serial killer and bigamist behind the “Brides in the Bath” murders, a case that was a breakthrough in forensic investigation. Suspicions arose when three women were found dead in their bathtubs within three years—and each one had left money to her husband. However, none of the victims showed signs of violence. Smith’s perfect crime unraveled when the Detective Inspector was able to link him to each woman, and the pathologist determined that Smith had done what to them? Discuss