Drawing elements from psychology, philosophy, and sociology, Charles Yeschke applies the theory of human need to the process of investigative interviewing. This theory is an important component of the successful interview and is crucial to an investigator's ability to correctly interpret human behaviour. The techniques described can be used in any setting with any subject, to guide the interviewer in how to observe indications of deception and how to respond to them. With added case studies and an entire chapter devoted to interrogative ethics, this second edition has been entirely updated.