w liars attempt to convince. American Journal of Forensic Psychology 2006; 24:2:31-38 17. Vrij A, Leal S, Granhag PA, Mann S, Fisher RP, Hillman J, Sperry K: Outsmarting the liars: the benefit of ask- ing unanticipated questions. Law and Human Behavior 2009; 33:159.166 18. Vrij A, Leal S, Mann S, Warmeli