In 2017, the U.S. Supreme Court ruled on the constitutionality of life in prison for juveniles. After reviewing several related cases, the U.S. Supreme Court ruled that life imprisonment for a juvenile offender is unconstitutional.

To Prepare
Read the Montgomery v. Louisiana (2016) decision.

https://www.supremecourt.gov/opinions/15pdf/14-280_3204.pdf

1 page with references.