Forensic Science Isn’t Science

How could forensic evidence, widely seen as factual and unbiased, nearly send an innocent person to his death? The answer is profoundly disturbing—and suggests that for every Earl Washington freed, untold more are sent to their deaths. Far from an infallible science, forensics is a decades-long experiment in which undertrained lab workers jettison the scientific method in favor of speedy results that fit prosecutors’ hunches. No one knows exactly how many people have been wrongly imprisoned—or executed—due to flawed forensics. But the number, most experts agree, is horrifyingly...