We report research where experienced police investigators (N = 6) are trained to use potentially incriminating information in a tactical (incremental revelation) and strategic (late revelation) manner during face-to-face interviews with mock suspects, versus a control (early revelation). While officers’ veracity judgments were significantly more accurate (for judging deceivers) when they used evidence tactically and strategically, a tactical approach to the revelation of evidence was found to be the most effective (for both deceivers and truth tellers). Mock witness’ perceptions of their interview performance is reported and discussed with recourse to investigators’ veracity performance.
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