In this case, the defendant was 16 years old when he was charged in a shooting. He was considered an “automatic transfer” under Illinois law and was charged in adult court in the Circuit Court of Cook County. He went to a bench trial and was acquitted of first degree murder. He was found guilty of second degree murder, which is not an automatic transfer offense.
The State never filed a motion asking for an adult sentencing hearing for which the law provides. Instead, apparently everyone, including the trial judge, assumed that adult sentencing would be automatic and proceeded thusly.
The Illinois Supreme Court reversed and remanded for a new sentencing hearing, including granting an opportunity for the State to file such a motion.
The case is People v. Cameron Fort.
http://www.illinoiscourts.gov/Opinions/SupremeCourt/2017/118966.pdf