The 1st District Appellate Court recently examined the collateral attack doctrine — which immunizes a court’s judgment from challenge in a separate judicial proceeding — in a case flowing from failed settlement talks.The defendants in Tielke v. Auto Owners Insurance Co., 2019 IL App(1st) 181756, four years after a 2013 personal-injury suit was filed, made an eve-of-trial verbal offer to settle for $700,000.The plaintiff’s counsel verbally accepted the offer the next day before trial started …