Missouri Revised Statutes Title XXXVIII. Crimes and Punishment; Peace Officers and Public Defenders § 558.047. Persons under eighteen, review of sentence, when, procedure

1. (1) Any person sentenced to a term of imprisonment for life without eligibility for parole before August 28, 2016, who was under eighteen years of age at the time of the commission of the offense or offenses, may submit to the parole board a petition for a review of his or her sentence, regardless of whether the case is final for purposes of appeal, after serving twenty-five years of incarceration on the sentence of life without parole.

(2) Any person found guilty of murder in the first degree who was sentenced on or after August 28, 2016, to a term of life imprisonment with eligibility for parole or a term of imprisonment of not less than thirty years and not to exceed forty years, who was under eighteen years of age at the time of the commission of the offense or offenses may submit to the parole board a petition for a review of his or her sentence, regardless of whether the case is final for purposes of appeal, after serving twenty-five years of incarceration, and a subsequent petition after serving thirty-five years of incarceration.

(1) Efforts made toward rehabilitation since the offense or offenses occurred, including participation in educational, vocational, or other programs during incarceration, when available;

(2) The subsequent growth and increased maturity of the person since the offense or offenses occurred;

(3) Evidence that the person has accepted accountability for the offense or offenses, except in cases where the person has maintained his or her innocence;

(4) The person's institutional record during incarceration; and

(5) Whether the person remains the same risk to society as he or she did at the time of the initial sentencing.