Humberto Leal García Jr. was born on January 16, 1973, in Mexico. He later moved to the United States and lived in San Antonio, Texas. Leal grew up in a working-class family and attended school in Texas. While living in the U.S., he became involved in criminal activity at a young age. Before his most serious crime, he had already been arrested multiple times for offenses like assault and drug possession.

Despite having legal residency in the U.S., Leal was a Mexican national, which later became an important issue in his case. He was not a high-profile criminal before his arrest for murder, but his actions on the night of May 21, 1994, would make him infamous.

On the night of May 21, 1994, 16-year-old Adria Sauceda attended a party in San Antonio, Texas. Witnesses said she had been drinking heavily and was possibly drugged. At some point during the party, several men sexually assaulted her before she was taken away by Humberto Leal García Jr.

Instead of taking her home, Leal drove her to a secluded area. He then brutally raped and tortured her. Investigators later found that she had been bitten multiple times, hit on the head with a large rock, and assaulted with a stick. Her body was discovered later with severe injuries, and a large piece of asphalt was placed on her arm.

Leal was arrested shortly after the murder. Investigators found physical evidence, including blood and other forensic material, linking him to the crime. He was charged with capital murder.

In 1995, Leal was found guilty and sentenced to death. However, his case became controversial because he was not informed of his right to contact the Mexican consulate after his arrest. This violated the Vienna Convention on Consular Relations, which guarantees foreign nationals the right to seek help from their home country’s diplomatic officials when arrested in another country.

Leal’s defense argued that if he had been allowed to contact the Mexican consulate, he might have received better legal representation. The Mexican government, the United Nations, and even the Obama administration asked for a stay of execution to allow Congress time to pass a law that would address the consular rights issue. However, the U.S. Supreme Court ruled against delaying his execution.

On July 7, 2011, Humberto Leal García Jr. was executed by lethal injection in Texas. Before he died, he apologized to Adria Sauceda’s family and his own, saying, "I have hurt a lot of people... I am sorry."