Left to Die in Prison: Emerging Adults 25 and Younger Sentenced to Life without Parole

By Ashley Nellis and Niki Monazzam

  Beginning at age 18, U.S. laws typically require persons charged with a crime to have their case heard in criminal rather than juvenile court, where penalties are more severe.1 The justification for this is that people are essentially adults by age 18, yet this conceptualization of adulthood is flawed. The identification of full criminal accountability at age 18 ignores the important, distinct phase of human development referred to as emerging adulthood, also known as late adolescence or young adulthood.2 Compelling evidence shows that most adolescents are not fully matured into adulthood until their mid-twenties.3 The legal demarcation of 18 as adulthood rests on outdated notions of adolescence. Based on the best scientific understanding of human development, ages 18 to 25 mark a unique stage of life between childhood and adulthood which is recognized within the fields of neuroscience, sociology, and psychology. Thus, there is growing support for providing incarcerated people who were young at the time of their offense a second look at their original sentence to account for their diminished capacity. A 2022 study found similar levels of public support for providing a second look at prison sentences for crimes committed under age 18 as for those committed under age 25.4 This brief proceeds in three sections: • Analysis based on a newly compiled nationally representative dataset of nearly 30,000 individuals sentenced to life without parole (LWOP) between 1995 and 2017. • Research review on adolescent brain development revealing that emerging adults share more characteristics with youth than adults. • Judicial, legislative, and administrative reform updates in nine jurisdictions: California, Connecticut, Florida, Massachusetts, Michigan, Vermont, Washington, Washington, DC, and Wyoming.

Washington, DC: The Sentencing Project, 2023. 22p.