Confession evidence is highly incriminating in court. We examined the interaction between chronotype and time of day on the confession decisions of 60 participants using an experimental paradigm. Pre-identified morning- and evening-type people were randomly assigned to participate in morning or evening sessions. Results supported an interactional asynchrony hypothesis that individuals are more likely to confess during "off-peak" periods (i.e., evening-types in the morning and morning-types in the evening). This interaction was obtained for both high- and low-seriousness transgressions. These results suggest that chronotype asynchrony constitutes a significant risk factor for false confessions and the wrongful convictions that often follow.