In this chapter, we briefly review the history of partner violence in legislation, policing, prosecution, and more recent alternatives to the traditional court process. We then describe the little that is known about the effectiveness of criminal justice responses to partner violence over the past half century. We draw on lessons learned from interventions for other forms of criminal conduct. We take the position that this field embodies some challenges for psychologists and researchers. First, most criminal justice responses to any problem are founded on an essentially lay understanding of human behavior. The implicit assumption is that people (especially men) will use violence if they think they can get away with it, and that punishment will act as both a general and a specific deterrent. Criminal justice responses, once applied, albeit with good intentions and optimism, are rarely subject to rigorous evaluation. However, scientific study reveals that, partly because they are based on too simple an understanding of violent behavior, many criminal justice interventions are ineffective or even counterproductive 219