The pressure to capture Carrillo intensified among U.S. and Mexican authorities,[
when?][
why?] and perhaps for this reason, Carrillo underwent facial
plastic surgery and abdominal
liposuction to change his appearance on July 4, 1997, at Santa Mónica Hospital in
Mexico City. However, during the operation, he died of complications apparently caused either by a medication or a malfunctioning respirator. Two of Carrillo's bodyguards were in the operating room during the procedure. On November 7, 1997, the two physicians who performed the surgery on Fuentes were found dead, encased in concrete inside steel drums, with their bodies showing signs of torture.
[9]