By Tara Vreeland, The News On 6

TULSA, OK -- "I'm going to kill again; I'll send you a letter when I do." Those are the words of a convicted murderer.

He made the promise in court Friday and again in a letter to the judge demanding the death penalty for himself.

In a letter to Judge Clancy Smith, Joshua Muller spells out his desire for the death penalty. Instead, the judge sentenced him to three life sentences, two without parole.

The mother of one of his victims says Muller got what he deserved.

Two years ago, Teresa Hill's 12-year-old daughter Leah Fuqua and Leah's 16-year-old cousin Derrico Ross, were in a vehicle with other relatives when Muller opened fire. 12-year-old Sheridan Rand was injured.

Muller fled and a manhunt ensued for several days before he surrendered. Muller plead guilty to the murders.

In a letter written in September to the judge, he said, "...I shure wished they all died so my body count could have been higher."

He goes on to say, "If I don't receive the death penalty you will force me to kill again. I've always dreamed of being there. Help me with my dreams."

The News On 6 asked Hill what she thought about the decision.

"I don't think he deserves, I don't think he deserves to die," Hill said.

The News On 6 asked Hill if she thought Muller got what he deserves.

"I do. I think he wanted the death penalty as an easy way out," Hill said.

Hill says Muller has never apologized.

"No. He's not sorry for what he did. He said that today in court, he said that today in court. He's not sorry for what he did," Hill said.

After Friday's sentencing, Hill felt relief. She says it's what they wanted before Christmas for her daughter to finally rest in peace.

She says she has to forgive Muller in order to move on, but she's not there yet.

"Forgiving and forgetting is two really, really big things to do. I have to forgive to move on or I'm not going to make it. Have I forgiven him? At this point in time, no," Hill said.

After learning his sentence Friday, Muller told the judge, "I'm going to kill again. I'll send you a letter when I do."

The judge said his request was similar to "state-sponsored suicide."