A successful St. Louis dentist orchestrated at least seven murders spanning two decades—from a 1958 shooting to a 1980 car bombing—by recruiting accomplices to kill the spouses of women he knew, collecting insurance payouts and splitting the proceeds. Glennon Engelman's decades-long killing spree went undetected until his wife wore a wire in 1980, exposing a calculated network of conspirators driven by greed. Engelman systematically targeted wives of victims he had personal or romantic connections to, ensuring he could access insurance money through them, revealing a cold financial motive behind each murder. Despite strong suspicion in the 1958 James Bullock murder, investigators lacked sufficient evidence to charge Engelman until recordings from his third wife Ruth implicated him in multiple homicides across three decades.