The U.S. Supreme Court is expected to make a ruling in January 2026 in the case of a Brownsville death row inmate who was convicted of beheading his three children.

John Allen Rubio was sentenced to death in 2010 after being found guilty of killing his 2-month-old daughter Mary Jane Rubio, and his two step-children, Julissa Quesada, 3, and John E. Rubio, 1, in 2003.

In May, the Fifth Circuit of Appeals denied Rubio’s certificate of appealability, officially ending his last attempt to challenge his guilty conviction. 

READ MORE: Appeal denied for Brownsville death row inmate who decapitated his children

Rubio is now asking the Supreme Court to overturn that decision.

Cameron County District Attorney Luis Saenz said the Supreme Court will decide in January if Rubio has exhausted his final appeal, or if they will hear his case.

"We just hope for the best that the Supreme Court will agree with the Fifth Circuit that he's not entitled to appeal anymore,” Saenz said.

The Supreme Court is expected to make their ruling on Jan. 12, 2026. 

Rubio's common law wife, Angela Camacho, is serving a life sentence in connection with the killings. 

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