A 27-year-old man with extensive neck and body tattoos will spend the next four decades behind bars after brutally murdering his 81-year-old common-law husband by slashing his throat inside their San Antonio home.

Alberto Rafael Ferrer Cabrera was sentenced to 40 years in the Texas Department of Criminal Justice by Bexar County District Judge Kristina Escalona on Friday, March 20, 2026. The brutal killing took place on February 1, 2025, when Cabrera, then 26, used a knife to inflict a fatal cut to the neck of Donald Atha Weynandt.

Authorities say Cabrera himself called 911 around 5 a.m. that morning and confessed to the slaying. He reportedly told the dispatcher, his landlord, and responding detectives that he had killed Weynandt. Officers arrived at the South Side residence and found the 81-year-old dead at the scene from sharp-force trauma to the throat.

No clear motive has ever been established. During the investigation, Cabrera allegedly mentioned feeling “stressed” about his efforts to bring his 4-year-old son from Colombia to the United States, as well as concerns related to Weynandt’s health. Prosecutors from the Bexar County District Attorney’s Family Violence Division presented the case, emphasizing the heinous nature of the domestic violence incident.

Cabrera pleaded guilty and accepted the 40-year sentence. By the time he is eligible for release, he will be in his mid-60s — still younger than Weynandt was at the time of the murder. The age gap between the killer and victim was stark: Weynandt was more than three times older than his assailant.

The victim’s daughter, Katrina Mercado, previously expressed deep shock and distrust of the relationship. She told local media she had never spoken to Cabrera and “personally did not trust the situation.” Mercado described the news as difficult to process and said she hopes her father will be remembered as a “loving father” who deserved to live out his final years in safety and dignity.

Bexar County District Attorney Joe Gonzales issued a statement following the sentencing: “Mr. Weynandt deserved to live out his life in safety and dignity. Our office remains committed to holding those who commit acts of violence fully accountable.”

Court records indicate Cabrera also faced an immigration detainer from U.S. Immigration and Customs Enforcement shortly after his arrest, along with a charge of illegal entry. That additional charge no longer appears on his current court records.

The case has drawn attention due to the dramatic age difference and the graphic nature of the killing. Weynandt, an elderly man in his 80s, was in a common-law marriage with the much younger Cabrera. Neighbors and family members were left stunned by the sudden violence in what appeared to be a quiet South Side home.

During the investigation, no weapon was immediately recovered in a way that altered the outcome, as Cabrera’s own confession provided the foundation for the charges. Prosecutors Brittany Mitchell and Angela Payne handled the case for the Family Violence Division, supported by a victim advocate and investigator.

The sentencing brings some closure to Weynandt’s family, though questions linger about what truly triggered the fatal attack. Cabrera offered no elaborate explanation in court or during interviews with detectives. The “stress” he cited appeared tied to personal family matters rather than any documented conflict with Weynandt.

This case highlights ongoing concerns about domestic violence in relationships with significant age disparities and power imbalances. While same-sex domestic violence receives less public attention than heterosexual cases, authorities stress that every victim deserves justice regardless of age, gender, or orientation.

Weynandt’s loved ones have asked the public to remember him not for the gruesome way he died, but for the life he lived — as a father and someone who deserved peace in his later years.

Cabrera is now in custody and will begin serving his sentence immediately. The 40-year term means he will remain incarcerated well into the 2060s unless parole is granted at some future date, though violent crimes of this nature often see limited early release.

As details continue to emerge, the San Antonio community is left grappling with how a relationship that once appeared stable could end in such sudden and lethal violence. The Bexar County DA’s office has reiterated its commitment to prosecuting family violence cases aggressively, sending a message that age or relationship status will not shield perpetrators from accountability.

For now, the mugshot of the tattooed 27-year-old and the smiling photo of the white-haired 81-year-old victim stand in stark contrast — a visual reminder of a crime that shocked the city and left a family searching for answers that may never fully come.