Berkeley, California, 1933. In a lab filled with curiosities–beakers, microscopes, Bunsen burners, and hundreds upon hundreds of books–sat an investigator who would go on to crack at least two thousand cases in his forty-year career. Known as the “American Sherlock Holmes,” Edward Oscar Heinrich was one of America’s greatest–and first–forensic scientists, with an uncanny knack for finding clues, establishing evidence, and deducing answers with a skill that seemed almost supernatural.