The Nearly 40-Year Mystery of a Missing Texas Mother Reopened

Buried in the Oil Fields: How a Long-Lost File Finally Gave Maria Mendez Her Name Back

For nearly forty years, the disappearance of Maria “Mary” Faye Mendez was a suffocating mystery that haunted her family. Maria, a 39-year-old mother of three, vanished from her Odessa, Texas, duplex on August 2, 1984. She had been through a volatile fight with her husband, Arnuldo “Arnoldo” Mendez, and was last seen heading toward a local bar. Before she left, she had asked her sister-in-law to watch her 5-year-old daughter, Virginia. She never came home.

For decades, her family lived in limbo, torn between the terrifying possibility that she had been harmed and the desperate, lingering hope that she had simply chosen to walk away from her life. Her disappearance was reported to the police two days later, but as the years turned into a decade, and then four, the trail went cold.

The breakthrough, as tragic as it was, only came because of a dedicated investigator. In 2022, Detective Lauren Gonzales of the Odessa Police Department was reviewing old files when she stumbled upon Maria’s case, which had been misfiled in a box of homicide records and effectively lost for nearly forty years.

As Detective Gonzales began to pull on the threads of the case, a darker picture emerged. She discovered that Maria’s husband, Arnuldo, had a history of domestic abuse and a pattern of using aliases. The investigation revealed troubling details, including reports of Arnuldo’s suspicious behavior and past comments he allegedly made regarding the disposal of bodies in the region’s vast oil fields.

The investigation finally led to the confirmation of Maria’s remains. In 1990, a skull had been found on a lease road near an oil drilling site in Crane County, though the location had not been properly documented at the time. Through DNA advancements, those remains were confirmed in 2023 to be Maria’s.

For the family, finding her was a moment of agonizing closure, but it has only intensified their need for justice. They have pointed investigators toward a specific necklace Maria was known to wear, hoping it might serve as a vital piece of evidence to link her final moments to those responsible.

Today, the case is an active homicide investigation. The family remains convinced that Maria was harmed by her husband, and they are still searching for the truth that was buried for so long. Detective Gonzales and the Odessa Police Department are continuing to work the case, and they are pleading for the public’s help to finally bring peace to Maria’s children and loved ones.

If you know anything—no matter how insignificant it might seem—please come forward:

Detective Lauren Gonzales: 432-335-4926

Odessa Crime Stoppers: 432-333-TIPS (8477) or 333tips.org

Reference Case Number: 84-7988