Huntsville, TX (KRGV) — John Allen Rubio remains scheduled to die by lethal injection after 6 p.m. on Thursday, Nov. 12, after several attempts to stop his execution failed.

Rubio was convicted twice of killing his three children in 2003 in Brownsville. Julissa was 3, John was 1, and Mary Jane was 2 months old when Rubio beheaded them.

Final hours: TDCJ outlines protocol as John Allen Rubio's execution nears

The Execution Intervention Project and the Church of the Condemned held an online vigil for Rubio Wednesday night. The Execution Intervention Project also spoke out against the death penalty and supported changing Rubio's sentence to life in prison earlier this week.

“Of course, it's unbelievably horrific. Of course he deserves to be executed. But the question is not what we want to do. The question is not our impulses. The question is what is good for Texas? What is good for society?” Execution Intervention Project founder Jeff Hood said.

RELATED STORY: Anti-death penalty groups make final push to halt execution of John Allen Rubio

The Execution Intervention Project plans to protest Rubio's execution.

“The defendant got his due trials. All his rights were respected. He got the right to appeal, he filed writs, he went to federal court and got denied. There has to be some finality, and that finality is Nov. 12 at 6 p.m.,” Cameron County District Attorney Luis Saenz said.

Saenz will be in the execution chamber with the family of the children.

READ MORE: Brownsville community reflects on 2003 child murders ahead of Rubio execution

This is a developing story, check back for updates.

WATCH ECHOES FROM BROWNSVILLE - THE RUBIO MURDERS, A CHANNEL 5 NEWS ORIGINAL DOCUMENTARY THAT EXAMINES THE SHOCKING CRIME