Denver

ADX Florence Inmates Sentenced for Roles in 2021 Inmate Death in Colorado Federal Prison

AI Assisted Icon
Published on June 26, 2025
ADX Florence Inmates Sentenced for Roles in 2021 Inmate Death in Colorado Federal PrisonSource: Google Street View

Two federal prison inmates at the U.S. Penitentiary-Florence, Administrative Maximum Facility (ADX) in Florence, Colorado, have received their sentences for their part in the death of a fellow inmate, an incident dating back to 2021, according to the U.S. Attorney’s Office for the District of Colorado. Jonathan Guillory, 45, was sentenced to 88 months for voluntary manslaughter after he attacked and fatally stabbed the victim with a homemade weapon; simultaneously, Anthony Bell, 44, was given 27 months for involuntary manslaughter, having kept the cell door closed, trapping the victim inside.

The plea agreements detailed a chilling narrative where on December 6, 2021, a violent attack ensued within the confines of a cell at ADX, Guillory brutally stabbed the victim in the base of the throat with a shank while Bell, aiding in the act stood watch, keeping the door sealed so the victim could neither flee nor be saved, this situation leading to deadly consequences. U.S. Attorney Peter McNeilly emphasized the severity of the incident, "This case underscores our unwavering commitment to safety within the federal prison system," he said, as obtained by the U.S. Department of Justice.

The terms of sentencing were handed down with United States District Judge Regina M. Rodriguez sentencing Guillory on June 18, and Bell previously, on June 12. The Federal Bureau of Investigation conducted the case investigation, and it was prosecuted by the Violent Crime and Immigration Enforcement Section of the U.S. Attorney’s Office. FBI Denver Special Agent in Charge Mark Michalek issued a stern reminder: "The FBI does not give felons a free pass to commit crimes because they are already serving federal time," as per the U.S. Department of Justice.