This study investigated the deception detection abilities of teenage offenders and teenage non-offenders who made veracity judgments about 12 videotaped interviewees, and also explored the behavioural characteristics of teenage liars and truth tellers. The findings revealed that teenage offenders were significantly more accurate in their credibility judgments than teenage non-offenders. However, the offenders’ impressive accuracy rates were not as a consequence of using valid cues to deceit. The feedback hypothesis helps to explain why the offenders were more accurate in their decisions: Operating within a criminal environment may mean that teenage offenders frequently lie and are lied to. Consequently, they receive more feedback than non-offenders regarding the effectiveness of their lies as well as how successful they are at detecting lies. As a result, their lie detection ability improves. The current study suggests moving away from individual deceptive cues as predictors of deceit towards a more intuitive and holistic approach to lie detection, such as the Brunswikian Lens Model.