This true crime book is about a fascinating man, who surprisingly is little known and has never been the subject of a book before, despite his world-renowned reputation and his fame in the media of the time. In the early twentieth century, Oscar Heinrich was a trailblazer in forensic science, and was instrumental in solving over 2000 cases in his lifetime, pioneering many of the techniques still in use today. These included comparison of hair and fibres, use of dual photomicroscopy for comparing bullets, blood spatter analysis, chemical comparison and identification of soil and sand samples and the use of insect larva in corpses to determine time of death. Additionally, his use of deductive reasoning and uncanny ability to profile criminals involved in his cases resulted in him being nicknamed ‘the American Sherlock.’
When the author, Kate Winkler Dawson, became interested in writing a book about Heinrich, she discovered that all his case files had been bequeathed to the University of California at Berkeley, where he taught forensic Science for thirty years, but had been left catalogued for over fifty years due to budget constraints. Winkler was able to persuade the University archivist to undertake the mammoth job of cataloguing the thousands of pieces of information in the collection and to open the collection to research. Heinrich kept everything from all his cases and his personal life – notes, letters, photographs, newspaper articles, even bullets and other evidence providing a rich treasure trove for a researcher.
The book focuses on eight of Heinrich’s more famous cases, not all of them successful, demonstrating his use of deduction and development of forensic science methods. Although, I felt the book could have been less choppy and more cohesively written, it’s a fascinating look at the evolving use of forensic science and criminology in some interesting cases, as well as the American justice system at the time and the difficulty of getting juries to accept and trust new types of evidence.
Although Heinrich had his detractors and competitors, self-styled experts who would offer incorrect science in court or try to ridicule his techniques, he also had his supporters. August Vollmer was a Berkley police chief and later a leading figure in the development of criminal justice who was a life-long supporter and advisor who went on to teach Criminology at UC Berkley. Heinrich’s best friend and confidant John Boynton Kaiser, a librarian and researcher kept up a life-long correspondence with Heinrich, discussing his cases as well as his personal life, his long hours of obsessive work in his laboratory and his long-term problem with debt and earning enough to support his family. More importantly he sent Heinrich books on criminology and forensic methods that he thought would interest him.
With so much material still in Heinrich’s archives, I suspect this book has only skimmed the surface and there may be more than enough for further books on this important pioneer of forensic science in criminal investigation.
With thanks to Icon Books and Netgalley for a copy to read.