Tylar Marie Witt and Steven Colver have been sentenced to prison for the murder of her mother in a gruesome 2009 stabbing.

Tylar was 14 when she and her boyfriend, then 19, hatched their plan to kill her mother, Joanne Witt, after she reported her daughter's boyfriend to authorities for statutory rape.

Tylar accepted a second degree murder plea deal with a 15 years to life sentence, and testified against her boyfriend.  He was sentenced to life in prison without parole for first-degree murder and special circumstances of lying in wait and killing a witness.

Elizabeth Smart kidnapper Brian David Mitchell has been sentenced to life in prison.

Smart, 23, was in the Salt Lake City courtroom Wednesday with her mother Lois, sister Mary Katherine and father Ed Smart. Mitchell had waived his right to be present in the courtroom.  There is no parole in the federal system, but Mitchell will be incarcerated outside of Utah because there is no federal prison in the state.

Elizabeth addressed the court and Mitchell, saying, “I don’t have very much to say to you.  I know exactly what you did. I know that you know what you did was wrong. You did it with a full knowledge. I also want you to know that I have a wonderful life now, that no matter what you do it will never affect me again. You took away nine months of my life that can never be returned, but in this life or next, you will have to be held responsible for those actions, and I hope you are ready for when that time comes."