SHAWNEE — A stream of witnesses, including the mother and daughter of convicted cop killer Byron James Shepard, pleaded with a jury Thursday to spare his life.

Pamela Dotson, Shepard's mother, sobbed as she described a life of domestic violence and drug abuse witnessed by Shepard growing up.

"I was getting beat all the time and using drugs all the time," Dotson, 59, told jurors who will decide his punishment Friday. "When I was doing drugs I didn't care how he felt about me."

Dotson apologized to her son for not being a better mother. Shepard, who showed little emotion during the trial, wiped away tears.

"I'm so sorry," she said. "I could have raised him a lot differently. It's all I know."

The woman denied accusations she blamed her son for a suicide attempt and taught him how to cook methamphetamine.

She told jurors her son "didn't deserve" the death penalty as punishment for his crime.

"He knows he's done wrong, I know he's done wrong," she said. "I can save him."

Prosecutors are seeking the death penalty as punishment for Shepard, 38, of Okemah. He was convicted Monday of killing Tecumseh police officer Justin Terney, 22, on March 26, 2017, following a traffic stop and foot chase.

They allege Shepard poses a "continuing threat to society."

Earlier this week, a convicted felon and two former love interests testified for the prosecution about physical abuse they suffered at the hands of Shepard.

Also Thursday, Shepard's 18-year-old daughter took the witnesses stand. Breanna Shepard cried, telling jurors how much she liked to go over to his house on weekends after her parents divorced.

"I've never seen his bad side," she said. "I've heard stories."

Breanna testified about being a high school senior who is planning to study physical therapy at the University of Oklahoma in the fall.

She said she would visit her father in prison because "I can't stand not seeing him."

She answered "no" when asked if she wanted him to receive the death penalty.