A Texas 19-year-old who called himself "evil" received a 45-year sentence on Thursday for the 2012 shooting deaths of his mother and sister, the Star-Telegram reported.

Jacob Ryan "Jake" Evans pleaded guilty to two counts of murder in the deaths of his 48-year-old mother Jami Evans and his 15-year-old sister Mallory, who were found dead at their Parker County home after Ryan called 911 and told the dispatcher he killed them.

Prosecutors intended to have Evans stand trial for the murders. But it was delayed in October when a judge ruled Evans was mentally unfit to stand trial after he was examined by psychologists.  

He received treatment at a mental hospital until late April, when he was deemed competent.  

The boy's relatives said they would support a lighter sentence to spare them the stress of a capital murder trial, the Star-Telegram reported.

"None of us want Jake and our family to be subjected to a capital murder trial, which we feel would not be in his and our family's best interest" the family said in a letter read to the court by Evans' attorney, Mac Smith. "We wish to close this chapter of our lives in order to continue healing as a family."

Using a gun he stole from his grandfather, then 17-year-old Evans shot his mother and sister multiple times at their home in Annetta South before dialing 911.

"Uh, I just killed my mom and my sister," he said according to a recording obtained by the newspaper.

"I feel like they were just suffocating me, in a way," Evans continued. "Obviously, you know, I'm pretty, I guess, evil."  

He was arrested on the spot after police arrived and found his dead relatives. He later told police he planned on killing his two other sisters and grandparents but changed his mind after shooting his mom and sister.

"I know now that I'm done with killing. It's the most dreadful and terrifying thing I will ever experience. And what happened last night will haunt me forever," the teen wrote in a statement to investigators.

Evans must serve at least 22 and a half years before he is eligible for parole.