ABSTRACT
It is still appropriate that this second edition on interview and interrogation begins with a quotation from a comedian. Comedians are perceptive individuals who can see humor and truth in people — two things that sometimes are one and the same. Interrogators attempt to be as perceptive as comedians — looking for the truth in people. The following chapters follow Groucho Marx’s advice and ask suspects whether they are telling the truth. The suspects’ truthfulness can be evaluated by their verbal and physical behavior as well as by their attitude toward the interrogator and the investigation.
