Tremors in the Blood
Murder, Obsession, and the Birth of the Lie Detector
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3.7 • 3 Ratings
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- $14.99
Publisher Description
BEWARE WHAT YOU BELIEVE: This “rollicking true crime” story reveals the surprising origins of the lie detector through shocking murders and dramatic trials (WIRED).
“Everything a reader wants in a true crime book—murder, mystery, gunfights, courtroom theatrics and dogged police work.” —Deborah Blum, bestselling author of The Poisoner's Handbook
Late one evening in the summer of 1922, Henry Wilkens burst through the doors of the emergency room covered in his wife’s blood. But was he a grieving husband, or a ruthless killer who conspired with bandits to have her murdered?
To find out, the San Francisco police turned to technology and a new machine that had just been invented in Berkeley by a rookie detective, a visionary police chief, and a teenage magician with a showman’s touch.
John Larson, Gus Vollmer and Leonarde Keeler hoped the lie detector would make the justice system fairer – but the flawed device soon grew too powerful for them to control. It poisoned their lives, turned fast friends into bitter enemies, and as it conquered America and the world, it transformed our relationship with the truth in ways that are still being felt.
As new forms of lie detection gain momentum in the present day, Tremors in the Blood reveals the incredible truth behind the creation of the polygraph, through gripping true crime cases featuring explosive gunfights, shocking twists and high-stakes courtroom drama.
Touching on psychology, technology and the science of the truth, Tremors in the Blood is a vibrant, atmospheric thriller, and a warning from history: beware what you believe.
PUBLISHERS WEEKLY
In this fascinating look at the history of lie detectors, Wired reporter Katwala (Quantum Computing: How It Works and How It Could Change the World) explores how American law-enforcement came to place its faith in them. In 1921, San Francisco police chief August Vollmer learned of experiments to detect lies by measuring blood pressure. He recruited officer John Larson, who had degrees in physiology and psychology, to build on those experiments. Aided by Leonarde Keeler, Larson invented a device that translated blood pressure measurements into written lines, to be analyzed after a subject was asked a series of questions. It was seized on by Vollmer as a breakthrough, but as Katwala shows, it led to significant false conclusions, as there "is no way for an examiner to be sure whether a change in blood pressure is due to fear of getting caught or anxiety about being falsely accused." More recently, lie detection technology has expanded to include processes "powered by brain scans and artificial intelligence" that have been "greedily adopted by police forces and governments, drawn in by the false promise of a machine that tells the truth." Katwala has real storytelling chops, and the chilling conclusion about the flawed nature of polygraphs truly hits home. This evocative account complements Ken Alder's The Lie Detectors: The History of an American Obsession.
