High-profile escape attempts

The first escape from USP Marion was on July 21, 1971, when Warren George Briggs leapt over two 15 foot fences and escaped to Kansas City, Missouri via Interstate 57. Four days later, Warren turned himself in to the FBI. He reportedly did this so he could draw attention to his invention, a water desalination process that would enable mankind to purify water at a reasonable cost.^[6]

On October 10, 1975, five inmates used an illegal homemade electronic device to open the front gates of the prison. One of them had been an electrician and was assigned to work on the lock mechanisms of all of the doors in the main corridors. He also converted a radio into a remote control, with which he opened all of the doors. The five escapees were all eventually captured and returned to prison, the last one being apprehended in Canada on October 31, 1975.

Two escape attempts occurred in 1978 involving the same inmate, Garrett Brock Trapnell. On May 24, 1978, Trapnell's friend, 43-year-old Barbara Ann Oswald, hijacked a St. Louis based charter helicopter and ordered the pilot, Allen Barklage, to fly to USP Marion. Barklage complied, but he wrestled the gun away from Oswald and fatally shot her while he was landing in the prison yard, thwarting the escape. On December 21, 1978, Oswald's 17-year-old daughter, Robin Oswald, illegally hijacked TWA Flight 541, which was en route from Louisville International Airport to Kansas City International Airport and threatened to detonate dynamite strapped to her body if the pilot did not fly to Williamson County Regional Airport, located only miles from USP Marion. When the pilot landed at the airport in Marion, hundreds of cops showed up, Robin Oswald surrendered to F.B.I. negotiators at the Williamson airport without incident about ten hours later. The dynamite was later found to be fake.^[7][8]

The last escape from the maximum-security prison area was on February 14, 1979, when Lawrence Caldwell, Albert Garza and Howard Zumberge climbed both exterior fences in a dense fog; Caldwell was caught before he could clear the first of the two fences.^[9] Both Garza and Zumberge were apprehended three days later near Cypress, hiding in a church basement. During the capture of the escapees, Garza shot Johnson County Sheriff Elry Faulkner in the chest at almost point-blank range; Faulkner, however, was wearing a ballistic vest and only suffered minor bruises. Garza was shot and wounded, but survived and returned to Marion two months later.^[10][11]

Murders of Correction Officers Clutts and Hoffmann

On October 22, 1983, correctional officers Clutts and Hoffmann were killed in separate incidents only hours apart, both at the hands of members of the Aryan Brotherhood, a white-supremacist prison gang. Officer Clutts was stabbed to death by Thomas Silverstein.^[12][13] While walking down a hall accompanied by Clutts, Silverstein was able to turn to the side and approach a particular cell. The prisoner in that cell subsequently unlocked Silverstein's handcuffs with a stolen key and provided him with a knife.^[13] Later that same morning, Officer Hoffmann was stabbed to death by Clayton Fountain, after Hoffmann had pulled Fountain off another officer who was being attacked.^[14]

Foreign Terrorists

Foreign citizens who committed or attempted terrorist attacks against United States citizens and interests.

Domestic Terrorists

American citizens who committed or attempted terrorist attacks against United States citizens and interests.

Organized crime figures

Others