Even though the U.S. Supreme Court has ruled unconstitutional sentencing juveniles to mandatory life sentences, the New York Times reports that "most states have taken half measures, at best, to carry out the rulings, which could affect more than 2,000 current inmates and countless more in years to come." State supreme courts have been split on whether the ruling was retroactive, The Times further reports.
One example of a long sentence is a 70-year sentence given to a 14-year-0ld in Florida.
The Times also notes: "Pennsylvania has the most inmates serving automatic life sentences for murders committed when they were juveniles: more than 450, according to the Juvenile Law Center in Philadelphia. In October, the State Supreme Court found that the Miller ruling did not apply to these prior murder convictions, creating what the law center, a private advocacy group, called an 'appallingly unjust situation' with radically different punishments depending on the timing of the trial."