Mann et al

Making A Case – How Psychology Can Inform the Investigative Process

Interviewing Suspects

2.1 Detecting Lies

–    After an arrest the purpose of the interview is to collect more evidence in order to establish guilt or innocence.

–    Police officers are trained to look for body language cues.

–    In the USA, polygraph testing is used.

Mann et al. (2004) Police Officers Ability to Detect Suspects’ Lies

Aim of the Study

–    To test police officers ability to distinguish between truths and lies during interviews with…