One of the creators of the modern-day polygraph, the man named after Leonardo da Vinci by his father in the hopes that he would do similarly great things, had just presented his findings in the case of Cecil Loniello and Tony Grignano, two young men on trial for the attempted murder of a police officer as they fled the scene of a robbery. The judge in the case had sought out the polygraph because of the technology’s showing at the 1933 World’s Fair police exhibit. Both sides had agreed to allow the test—the defendants…