A jury on Monday began deliberating the sentence for a 19-year-old who was found guilty of attempted capital murder in a 2021 shooting at a Dallas-area high school that wounded two other students and a teacher.

Timothy Simpkins faces up to life in prison following his conviction last week by the Tarrant County jury. Simpkins was 18 when he opened fire on Oct. 6, 2021, inside Timberview High School in Arlington during a fight with Zaccheaus Selby, who was 15 at the time and was among those wounded.

TEXAS HIGH SCHOOL SHOOTING SUSPECT GRANTED BOND ARRESTED FOR VIOLATING TERMS OF RELEASE

Taking the witness stand during the trial's punishment phase, he said that he understood what he did was wrong. Simpkins repeatedly told jurors that he carried the gun to defend himself.

Timothy Simpkins faces a potential life sentence for opening fire on a fellow student during a confrontation at an Arlington, Texas high school. (Amanda McCoy/Star-Telegram via AP)

"I’m truly sorry. I’m just asking for another chance," Simpkins said. "I wish every day I could take it back. But I can’t."

FAMILY OF TEXAS HIGH SCHOOL SHOOTING VICTIM 'SHOCKED' BY VIDEO OF FIGHT BEFORE GUNFIRE

According to testimony, Selby went straight to Simpkins when he entered the classroom late that morning and began beating Simpkins. After the two were separated, Simpkins fired at Selby, striking him three times.

CLICK HERE TO GET THE FOX NEWS APP

Another student was grazed by a bullet while running to safety, and a teacher was shot in the shoulder.