Where the state seeks to sentence the defendant as a Class X offender based on prior convictions, those convictions cannot include ones which, if they took place under the laws at the time of the instant offense, would have been the exclusive jurisdiction of the juvenile courts.The 1st District Appellate Court vacated and remanded the decision of Cook County Circuit Judge Mary Margaret Brosnahan.Keuntae Miles was arrested for breaking into a discount store on June 9, 2016, with the intent to commit theft. He was found …