Most people think of the police as the ones who prevent crime. According to Blumstein (2000), the police claim to be society's best defense against crime. On the contrary, police presence can reduce or even significantly increase crime rates in specific locations and at specific times, depending on their activities at that time. Blumstein goes on to emphasize the importance of community policing to prevent violent crime with fundamental changes in management, structure, culture, community partnership and zero-tolerance policing, which is part of Compstat. Weisburd et al. (2003) describe the Compstat model as a management process within a performance management framework that synthesizes crime and disorder data analysis, strategic problem solving and a clear accountability structure. Additionally, Compstat facilitates accurate and timely analysis of crime and disorder data, thereby identifying crime patterns and problems. The system tailors analysis for implementation through rapid deployment of staff and resources. An accountability structure is essential to ensure that analyzes and responses to effectively reduce crime and disorder are implemented. In summary, violent crime, that is, the use of force or threat of force against a person, used to be worse than it is today. Over a period of thousands of years, many periods of transition would occur on the path to less violent crime. These transitions of decline were the pacification process, the civilization process, the humanitarian revolution, the new peace and the rights revolutions. Today, television portrays violent crime as much worse than reality, while other crimes are much less than reality. Finally, police presence alone will not end violent crime; however, a systematic approach to police changes