A divided 1st District Appellate Court on Monday upheld the 50-year sentence a defendant received for murdering someone on his “kill list” when he was 15 years old.The majority — led by Justice Daniel J. Pierce — found that defendant Sebastian Rodriguez’s sentence was not a de facto life sentence and did not violate either the U.S. Constitution’s Eighth Amendment or the Illinois Constitution’s proportionate penalties clause.In upholding Rodriguez’s sentence for the murder of …