1989 kidnapping and murder in Mexico
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.
After the bodies were discovered on April 11, 1989, Constanzo fled to Mexico City but was eventually tracked down. As the police surrounded his apartment complex, Constanzo died after ordering one of the cult members to kill him with a machine gun. Sara Aldrete, another high-ranking member of the cult, was arrested at the scene along with several others. In 1993, the cult members were found guilty of a number of charges, including capital murder and drug trafficking. Several of them, however, claimed they were not guilty of Kilroy's murder and told the press they were tortured to confess. Two suspects still remain at large.
Background.
Victim.
Mark James Kilroy was born on March 5, 1968, in Chicago, Illinois, U.S. His parents were James William "Jim" Kilroy (1943-2024), a chemical engineer, and Helen Josephine Kilroy (1944-2014), a volunteer paramedic. They moved to Texas from the Midwest after their son was born. Kilroy grew up in Santa Fe, Texas, a small town outside of Houston, for over 15 years along with his brother Keith Richard Kilroy. He was raised as a Catholic and his parents were frequent attendees at Our Lady of Lourdes Catholic Church in the adjacent town of Hitchcock, Texas. Kilroy excelled both in academics and athletics as a teenager, and played baseball, basketball, and golf with his friends at school. He was in the Boy Scouts of America and an honors student at Santa Fe High School, where he was a member of the student council, and was ranked 14th in a class of 210 students. Upon graduation in 1986, he attended Southwest Texas State University in San Marcos, Texas, before transferring to Tarleton State University in Stephenville, Texas, on a basketball scholarship. At Tarleton he became a member of the Lambda Chi Alpha fraternity. He then decided to give up his athletics and transferred to the University of Texas at Austin to become a pre-med student and prepare for his Medical College Admission Test (MCAT).
Profile of cult leaders.
Kilroy's murderer, Adolfo Constanzo, was a Cuban American who was born in Miami, Florida, in 1962. His father died when he was an infant, so his mother relocated to Puerto Rico with him, where she remarried. They returned to Florida in 1972 and his stepfather died soon afterwards, leaving a large inheritance behind. His mother married again, this time with a man who was involved in drug trafficking and the occult. His stepfather taught him a philosophy that Constanzo carried for the rest of his life: he told him that he should let nonbelievers "kill themselves with drugs" while he could profit from their foolishness. Around the same time, Constanzo's mother believed that her son had psychic abilities. She introduced him to Palo Mayombe, an Afro-Caribbean religion that involves animal sacrifice. He also was introduced to Santería when he was younger. He started as a "palero", someone who practices Palo Mayombe, and eventually reached the status of high-priest, "padrino". In 1984, he moved to Mexico City to start his life as a tarot card reader and eventually developed a cult following. His charisma, physical attractiveness (he previously worked as a male model), and claimed psychic talent granted him the opportunity to mingle with Mexico City's upper class. His reputation for predicting the future and offering ritual cleansing became popular with some drug dealers, musicians, and police officers.
The other cult leader was Sara Aldrete, a Matamoros native and an honors student and cheerleader at Texas Southmost College. She was the girlfriend of Gilberto Sosa, a drug dealer linked to the Hernández clan to which Constanzo wanted an introduction. In 1987, she met Constanzo and eventually became the cult's main recruiter. Investigators believed that Aldrete's physical attractiveness and charm helped her lure men to join the cult or to set them up to be abducted and killed. She recruited people by first showing them the 1987 thriller film "The Believers", which was about a New York City-based cult that practiced human sacrifice for money and influence. Constanzo's members were forced to see the film again and again in order to indoctrinate them to the necessity of human sacrifice. Students and teachers at her college in Brownsville recalled her as a friendly and studious physical education student who showed no signs of abnormal behavior or involvement with a religious cult. Across the border in Matamoros, however, Aldrete was involved in drug smuggling operations and in cult activities. Some of her former classmates found it suspicious that she drove a 1989 vehicle with an embedded telephone, while others recall she preferred to dress in black. Investigators believed that her proximity to the U.S.-Mexico border allowed Aldrete to keep her two lives separate for years. Because of her contradictory lifestyle, law enforcement believed that Aldrete was living a double life and showed signs and symptoms of having a multiple personality disorder.
The ranch where Kilroy was murdered in Matamoros, Santa Elena, was owned by Brigido Hernández. He was not a follower of Constanzo and was not charged with any crimes in the U.S. or Mexico. The sudden death of Saul Hernandez in a shooting prompted his family, including Elio and his brothers Serafín Sr. and Ovidio, to grow closer to rituals and eventually become members of Constanzo's cult. Elio reportedly offered Constanzo half of his family's drug proceeds in exchange for his criminal contacts and supernatural protection for his family.
Spring break trip.
Prior to disappearance.
On March 10, 1989, Kilroy's childhood friend Bradley Moore finished exams early at Texas A&amp;M University and headed to Austin to pick him up. Both of them then headed to Santa Fe to pick up two other friends, Bill Huddleston and Brent Martin, before heading to South Padre Island, Texas, for spring break. After a foggy, 9-hour drive to South Texas, they arrived at South Padre Island shortly before midnight. They checked in at the Sheraton Hotels and Resorts the next morning before heading to the beach. 
There were few tourists when Kilroy and Moore initially arrived at South Padre Island at the beginning of the five-week spring break season; as the weekend progressed, thousands of students from the entire U.S. began to arrive. Beer sponsors were staging a variety of entertainment events, including free movies, music concerts, calls home, surf-simulator activities, and opportunities to appear on TV commercials. Kilroy and Moore made free phone calls to their parents that day. Later that evening, they met a group of female students from Purdue University and partied until the next morning.
The following morning, Kilroy and his friends had more or less a daily routine in mind. They went to the beach in the morning and suntanned before lunch. After lunch they went to the beach area behind their hotel for the daily Miss Tanline contest. Once the event was over that afternoon, Kilroy headed to the hotel for a quick nap before planning their trip to Mexico. They left South Padre Island that evening and stopped for dinner at a Sonic Drive-In in Port Isabel, Texas, where they met a group of female students from University of Kansas who were planning to party in Mexico as well. The women then followed Moore's car from Port Isabel to Brownsville and parked their cars close to the Gateway International Bridge before crossing the U.S.-Mexico border on foot. Kilroy's friends and the Kansas women spent most of their evening at Sergeant Pepper's night club in Matamoros before the groups went their separate ways. Kilroy and his friends then returned to South Padre Island early the next morning. On March 13, Kilroy and his friends attended another Miss Tanline contest behind the Sheraton. Early in the evening, Kilroy met with one of his former frat brothers at a condo party. At around 10:30 p.m. CT, Kilroy and his friends headed back to Matamoros. They parked on the border and crossed on foot again.
That night, Matamoros was flooded with 15,000 spring tourists from the U.S. on the city's main tourist street, Álvaro Obregón. The sidewalks, street, and night clubs were packed with foreign tourists looking to enjoy cheap alcohol and enjoy Mexico's lax drinking laws. When they got to Matamoros, Kilroy and his friends decided to go to the bar with the shortest waiting line. They ended up at Los Sombreros, a bar with rock music and bright neon. After a few drinks, Kilroy and his friends left Los Sombreros and wandered to London Pub, which rebranded itself as Hardrock Café for spring break. This bar was louder and wilder than Los Sombreros, and Kilroy and his friends stood at the bar while other tourists threw beer from the balcony. Kilroy met with a few women at the bar and was not seen by his friends for a while. Around 2:00 a.m. CT, Huddleston suggested the group head back to South Padre Island. As his friends stepped out of London Pub, they saw Kilroy leaning against a car and talking to a woman from Miss Tanline. Across Álvaro Obregón street, thousands of tourists were leaving the bars and heading to Brownsville, but others moved in different directions. The large crowd of people made it difficult for Kilroy and his friends to walk across the border uninterrupted and in a group.
Disappearance.
Moore and Martin separated from the group and walked to García's, a popular restaurant-store close to the border. Kilroy stopped at the steps of a house on Álvaro Obregón to say good-bye to the woman from Miss Tanline. He then waited for Huddleston to walk towards him. Huddleston then ran to a nearby alley to urinate while Kilroy waited for him. By the time Huddleston came out and caught up with the other two near García's, Kilroy had vanished. His friends searched for him for hours, even after the establishments had closed and the streets had cleared at around 4:30 a.m. CT. They then crossed the border thinking Kilroy may have crossed to Brownsville and was perhaps waiting near their parked car. His friends did not find him near their car and waited a few minutes in Brownsville before returning to South Padre Island. They thought that Kilroy probably left for the hotel with someone else. They woke up the next day at the hotel and Kilroy's whereabouts were still unknown. His friends then contacted the police to report him missing.
Investigation.
The search for Kilroy initially began as a routine missing persons investigation. Students that were reported missing in Matamoros in the past would often turn up in the following days with a hangover and blurry memory of what had happened to them. Kilroy was one of the 60 people who had disappeared in Matamoros in the first three months of 1989. However, his case drew more attention in the U.S. because his uncle, Ken Kilroy, worked at the United States Customs Service in Los Angeles. When the news reached his uncle, a police task force was created in Brownsville to search for Kilroy. Alarmed with the bad publicity of his disappearance and the potential effects of tourism in Matamoros, local police officers tried to shift the blame and suggested that Kilroy had disappeared in Brownsville. Kilroy's friends denied such claims. The Mexican federal police force vowed to work on the case and help U.S. investigators. One of the commanders assigned Mexican agents to U.S. officials to accompany them in Matamoros. Together they questioned informants, potential witnesses, and worked on tips provided by their sources.
Both Mexican and U.S. authorities suspected that Kilroy's disappearance involved foul play.