Results indicated that maternal attachment was related to self-control and that both attachment and self-control independently predicted deviant behavior. In addition, the study revealed only partial support for the ability of low self-control to mediate the effects of both attachment on deviant behavior, contrary to the general theory’s predictions. Based on the limited number of cross-cultural studies testing the effects of both attachment and low self-control on involvement in crime and deviance, this study offered an empirical examination using a homogenous sample of Puerto Rican adolescents attending public school in Dorado, a metropolitan area of San Juan. The effect of maternal attachment on self-control and deviant behavior was explored, along with the possible mediating influence of low-self control. Tables, notes, and references