In a series of unpublished letters obtained by Mexican media, Joaquín "El Chapo" Guzmán, the former Sinaloa cartel leader and once one of the world's most wanted criminals, claims that conditions at ADX Florence, the federal supermax prison in Colorado where he has been held since July 2019, are pushing him to the brink of insanity.
ADX Florence is considered the most secure federal prison in the United States. It is known for housing the country's most dangerous inmates under the strictest isolation measures. Guzmán is serving a life sentence there on multiple charges, including drug trafficking, conspiracy and murder.
