Lindsay Clancy used the 'insanity defense'. How often is it successful? NPR | By Ayesha Rascoe Published September 6, 2026 at 7:20 AM CDT Facebook Twitter LinkedIn Email Print Listen • 5:33 NPR's Ayesha Rascoe asks New York Law School's Heather Cucolo about the insanity defense and how often such defenses are successful. Copyright 2026 NPR