Over the period of the intervention and operation of the-AGI project, there was a considerable decline in gun crimes in the target precincts, whereas the number of such offenses rose in the comparison precinct. This was particularly the case in the Ninth Precinct, where a statistically significant reduction of gun crimes occurred. Perhaps more importantly, this reduction represented 112 fewer gun crimes, and thus a commensurate fewer number of victims, per month in this precinct. Given the design of this study and available data, these results cannot be directly attributed to the intervention. However, there is a strong indication that these aggressive policing tactics contributed significantly to this meaningful reduction.
Bynum, Timothy S. and Varano, Sean P., "The Anti-Gang Initiative in Detroit: An Aggressive Enforcement Approach to Gangs" (2002). School of Justice Studies Faculty Papers. Paper 18.