Investigation of individual inmates' characteristics are almost entirely absent from research of prison riots. The current study sought to fill this void using official infraction records and prison dossiers of 831 male inmates selected from the southwestern USA. Logistic regression models indicated that inmates who were cited for criminal infractions, such as theft, possession of weapons or drugs, threatening staff, and social risk factors were significantly more likely to engage in prison rioting. In fact, the model which contained criminal career, demographic information, infraction, and other social risk factors explained 40% of the variation in prison rioting. Suggestions for research on prison riots that included inmates' criminal history and characteristics of infraction are offered.