Recent analyses of the relationship between crime and an aggressive patrol strategy have led to no single conclusion concerning the deterrent power of aggressive policing. This research adds to that debate by exploring the effects of a variety of aggressive patrol tactics on several different crimes. The empirical analysis, based on cross-sectional data from sixty urban neighborhoods, indicates that there appears to be no stable complex of police actions that constitute an aggressive patrol strategy. However, one form of police action usually included under the rubric of aggressive patrolsuspicion stopsmay indeed deter certain types of criminal activity. (Published Abstract)