Whether an 18-year-old defendant's de facto life sentence violates the Illinois proportionate penalties clause

QUESTION(S) PRESENTED “I. In an action in which the sole claim is whether,in a case in which an 18-year-old defendant who received a de facto life sentence does that sentence violates the Illinois proportionate penalties. clause? | ; Answer of the court below: No,petitioner was deemed the principal ; in those offenses. .