WTF Fun Fact – Serial Killer Donald Harvey

Donald Harvey, a nurse who killed 37 patients, was only caught because the medical examiner who performed the autopsy on one of his victims had the genetic ability to smell cyanide. This prompted an investigation and eventual arrest. – WTF Fun Facts

Source: https://eu.usatoday.com/story/news/health/2019/10/18/clarksburg-west-virginia-veterans-affairs-deaths-medical-murders/3936045002/