Adolfo de Jesús Constanzo was a Cuban-American serial killer, drug dealer and cult leader who led an infamous drug-trafficking and occult gang in Matamoros, Tamaulipas, Mexico, that was dubbed the Narcosatanists by the media. His cult members nicknamed him The Godfather. Constanzo led the cult with Sara Aldrete, whom followers nicknamed "The Godmother". The cult was involved in multiple ritualistic killings in Matamoros, including the murder of Mark Kilroy, an American student abducted, tortured and killed in the area in 1989.

On March 14, 1989, University of Texas at Austin student Mark James Kilroy was kidnapped in Matamoros, Tamaulipas, Mexico, while vacationing during spring break. He was taken by his abductors to a ranch where he was tortured and sodomized for hours before being murdered in a human sacrifice ritual. Kilroy was killed with a machete blow and then had his brain removed and boiled in a pot. His killers then inserted a wire through his spinal column, amputated his legs at the knees, and buried him at the ranch along with 14 other people who had been killed there before him. Adolfo Constanzo, the leader of the cult, told his followers that human sacrifice granted them immunity from law enforcement for their drug smuggling operations. The killing drew worldwide media attention and initiated an international police manhunt because of the unusual circumstances of the crime.