The present study is aimed at completing the work on imminent threat detection using CCTV. The main goal was to investigate nonverbal behavioral cues to the concealment of hostile intentions while investigating the influence of personality traits. Thirty-five participants (19 women were asked to complete a questionnaire assessing their empathetic traits (affective empathy, cognitive empathy, emotional contagion), their "dark" personality traits (machiavellianism, narcissism, psychopathy) and their arousal. They then chose their test condition (aggression or non-aggression) which consisted of completing a route simulating an airport queue. During the course, participants made two stops of unknown duration (30 seconds and 1 minute respectively) before presenting their phone or shooting at a target (depending on the condition). Non-verbal behaviors were counted for each stop by body area (e.g. upper face, lower face, chest, etc.). Multiple regression analyses demonstrated the involvement of lower limb movements in the concealment of hostile intentions, as well as the influence of empathy levels and so-called "dark" personality traits such as narcissism and psychopathy. These results provide additional data regarding the concealment and the detection of malicious and even criminal behavior using CCTV.