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.