Juan Carlos Abregon is another close friend of Thomas's at the prison. He is a tough, uncompromising man, but not inclined to violence. Initially, Juan Carlos reveals little about himself to Thomas, but the two gradually develop a friendship based on mutual trust. They organize illegal deals together from the prison and split the profits, although they lose their investment on one failed deal. Juan Carlos gives money to Thomas to help the Velascos, who need to bribe an official. Later, when Juan Carlos is sent to Chonchocoro Prison and his girlfriend steals his money, he demands that Thomas retrieve the loan to the Velascos. Thomas is unable to get the money, and Juan Carlos hangs himself, which crushes Thomas.