In my view, effective law enforcement is a vital part of the mix in gun violence prevention, and developing and evaluating police investigation methods should be a central aspect of the research agenda for gun violence prevention. What distinguishes the public health approach as usually articulated is its tendency to ignore, downplay or outright reject the role of police and criminal justice in gun violence prevention. In the pursuit of evidence-based gun violence prevention, it only makes sense that the research incorporate the front-line capacity for preventing violence and determine how to make it more effective.