Where the defendant is charged with possessing a certain amount of contraband after the police commingled known contraband with other materials, counsel for the defense may be ineffective if he doesn’t challenge the use of all the contraband as the defendant’s.The 1st District Appellate Court reversed and remanded a decision from Cook County Circuit Judge Matthew E. Coghlan.Carlos Miramontes was arrested and charged with possession of more than 400 but less than 900 grams of a substance containing …