Sara Aldrete

Sara María Aldrete Villareal (born September 6, 1964) is a Mexican serial killer who headed a drug smuggling and human sacrifice cult along with Adolfo Constanzo. She was convicted of the murder of Mark Kilroy, an American student killed in Matamoros in 1989, along with several other killings.

Born in Matamoros, Tamaulipas, Mexico, she attended high school in Brownsville, Texas, United States, while still living south of the border, and gained resident alien status so she could attend Texas Southmost College. She was known among her peers as a good student. She is 6 ft 1 in (1.85 m) tall and studied physical education, preparing to transfer to a university to earn a physical education teaching certification.

Adolfo Constanzo, a Cuban American fortune-teller and religious cult leader, introduced her to witchcraft and dark magic. He gave her the nickname "La Madrina", Spanish for "godmother", and initiated her into his cult, which was a conglomeration of Santería, Aztec warrior ritual, and Palo Mayombe, complete with blood sacrifices. Constanzo sexually assaulted and killed drug dealers and used their body parts for religious sacrifice ceremonies in an old warehouse near Matamoros. Many of his victims' body parts were cooked in a large pot called a nganga. Constanzo made Sara Aldrete second-in-command of his cult, and directed her to supervise his followers while he was out shipping marijuana over the border into the US.

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