The u. s. supreme court abolished life imprisonment without the possibility of parole for persons who commit serious crimes other than homicides as

2010

Explanation:

This decision was considered a landmark decision following the Graham v. Florida in 2010.

The argument that is made for the decision is that teenagers till haven't mentally grown enough to be able to make the best decisions in their life. (even a lot of adults still make mistakes)

Because of this, they should've never been denied the chance for redemption in their life even after they commit serious crimes. As long as they showed good behaviors during their correctional period, there still be a chance that they can turn their life around.

uwu pennywise or ronald