Two doctors whose tortured, bound and burned bodies were found in an oil drum filled with concrete had been charged with homicide in the death of a drug lord.
Prosecutors revealed the charges Thursday and said the death of Mexico's top drug lord after plastic surgery was not a medical slip-up.
Before police could arrest the doctors, three decomposing corpses were found this week in the oil drum. Two have been identified as physicians in Amado Carrillo Fuentes' July 4 surgery.
A third doctor also was charged last month, prosecutors said. Police have yet to say whether that doctor's body was the third one in the oil drum.
Carrillo - known as the "Lord of the Skies" for his use of jetliners to haul cocaine into the United States - died after undergoing extensive cosmetic surgery and liposuction in an apparent attempt to change his appearance to elude police.
His doctors must have known that the sleep medication they gave Carrillo after his surgery would kill him, given his weak liver, said Mariano Herran Salvatti, special prosecutor in charge of drug crimes.
"We have concluded that the doctors, with the intention of killing (Carrillo), administered the medicine," Salvatti said.
Prosecutors did not say what evidence they had that the death was intentional or suggest a motive for the killing of Carrillo, who ran the powerful Juarez drug cartel out of northern Mexico.
At least one of the doctors had been reported missing two weeks ago.
Mexican and U.S. authorities are moving to quash talk that Carrillo actually did not die in the surgery, with some saying the drug lord is alive and well in Chile and some saying he's fallen into the hands of American drug agents.