Three of Joaquin “El Chapo” Guzman’s sons, along with 25 other people, have been charged by Mexican authorities in relation to a significant fentanyl trafficking operation.

The three brothers known as the “Chapitos” or “little Chapos,” Ovidio Guzmán López, Jess Alfredo Guzmán Salazar, and Iván Archivaldo Guzmán Sálazar, are charged with torturing their victims with corkscrews, electrocution, and hot chilies as well as feeding some of their adversaries “dead or alive to tigers.”

The victims allegedly underwent torture to gather information, and once they had it, the Chapitos themselves or under their supervision killed them, according to an indictment that CBS News was able to receive.

Some of the bodies were fed to tigers owned by Iván and Jess Alfredo, while others were scattered over the countryside. In addition to being electrocuted and waterboarded, several of the victims served as test subjects to gauge the potency of the fentanyl they were given.

The arrest and murder of two federal law enforcement officials in Mexico in 2017 is also described in the indictment. Two of El Chapo’s sons are allegedly implicated in this incident.

In front of the Chapitos, the officers underwent horrifying torture, including one who had a muscle torn out with a corkscrew and then had hot chilies put into it.