In 1981, Thomas Silverstein and Clayton Fountain were charged with the murder of a black inmate named Robert Chappelle in the Marion control unit. It was believed that Silverstein and Fountain strangled Chappelle in his cell. They later contacted Geri Riley to let her know it was done. Silverstein and Fountain later killed Raymond Smith, a friend of Robert Chappelle. The two men stabbed Smith 67 times. Silverstein then started to plan killing a correctional officer. On October 22, 1983, gang members from the Aryan Brotherhood killed two correction officers at the United States Penitentiary, Marion, Illinois. Silverstein killed an officer named Merle Clutts, stabbing him approximately 40 times. Several hours later, Fountain also killed an officer named Robert Hoffman. The tactics used were developed for a prior inmate murder; Silverstein used an improvised knife and handcuff key while being taken to the showers. He picked the lock, then attacked and killed Merle Clutts. Fountain used similar tactics to kill Robert Hoffman.