D A L L A S, XXXX -- Michael Serge, a retired Scranton, Pa., police officer, claims he was "only protecting himself" when his wife came at him with a knife and he shot her. But for the first time in a ...

When a serious crime such as a murder occurs, the identity of the perpetrator may not be obvious. In whodunit scenarios, where it is unclear who is responsible for wrongdoing, forensic science often ...

Polygraph (cardio-pneumo-psychograph); 1921. Gift of City of Berkeley Police Department. Photo by Jaclyn Nash, National Museum of American History. The Smithsonian’s National Museum of American ...