The present study examined the eye-tracking Concealed Information Test (CIT) in a mock crime scenario. Participants were instructed to either commit a mock crime on campus (guilty participants; n= 42), read an article about this mock crime (informed innocents; n= 45), or read an unrelated article (naïve innocent participants; n= 46). Afterward, all participants were presented with an eye-tracking CIT task. Based on preregistered analyses of participants’ gaze behavior, we were able to distinguish the guilty participants from the naïve innocents (area under the curve [AUC]=. 71, 95% CI [. 60,. 82]). Interestingly, we were also able to distinguish the guilty participants from the informed innocent ones (AUC=. 65, 95% CI [. 53,. 77]). Although these results are promising, the observed detection efficiency was lower than both previous eye-tracking CIT studies that used highly familiar stimuli as well as mock crime CIT studies relying on physiological measures.(PsycInfo Database Record (c) 2023 APA, all rights reserved)