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