When St. Louis County prosecutor Doug Sidel took on the 1993 case against Gary Muehlberg, he immediately recognized Muehlberg as a sadist. The 44-year-old Bel-Ridge man was on trial for the February 1993 killing of 57-year-old Kenneth “Doc” Atchison, whom Muehlberg lured over to his house on the pretense of selling him a car. Muehlberg killed Atchison, stealing $6,000 in cash and the car Atchison had driven over.