A scientist says he can scan prisoners’ brains for signs of evil. Did his disputed science put a man on death row?

Kent Kiehl's controversial brain-scanning methods, which claim to detect signs of violent tendencies in prisoners, have found their way into the US legal system, often to the detriment of those convicted. His work has been used by defense lawyers, sometimes resulting in severe consequences for inmates, including death row sentences. Critics argue that the science behind Kiehl's methods lacks solid evidence and question its ethical use in legal contexts. This raises significant concerns about the intersection of neuroscience and justice, highlighting the need for rigorous validation before such technologies are trusted in high-stakes scenarios.