Where a school district acquiesced to claim-splitting by failing to raise the issue of res judicata as an affirmative defense for more than 18 months, the lower court order was reversed.The 7th U.S. Circuit Court of Appeals reversed a decision by Chief U.S. District Judge James E. Shadid, Central District of Illinois.Steven Hamon, a clinical psychologist, began treating Eymarde Lawler in 1994. Lawler was diagnosed with complex post-traumatic stress disorder with accompanying symptoms of dissociation and depression. After …