Medical Experts: Investigation of Insanity by Juries

A passionate 19th-century argument for reforming how courts handle insanity cases. W. S. Thorne, writing from California, witnessed a system he believed was fundamentally broken: untrained juries making life-or-death decisions about mental illness, medical experts working without legal protections or fair compensation, and contradictory verdicts that served no one. Through case studies of jury decisions that flatly contradicted each other on nearly identical facts, Thorne exposes the logical bankruptcy of letting laypeople decide questions of mental disease. He argues fiercely for professionalizing the process, giving doctors legal standing in court, and recognizing that determining insanity requires expertise no juror possesses. Though written in the 1800s, the book resonates with modern debates about scientific illiteracy in the courtroom and the recurring fight to have medical professionals, not lay assumptions, guide decisions about mental competency.