While most police chiefs might be willing to make such a claim that there is a positive relationship between COPS grants and police arrests, empirical research on this topic is very limited. Following from an earlier study by Zhao, Scheider, and Thurman (2003), this research makes several contributions to the current literature. First, it includes additional years of data from police agencies receiving Federal funding to examine the effects of additional resources on arrests. Second, making use of the two waves of census data (1990 and 2000) allowed time-varying analysis of the relationship between police arrests and demographics. Finally, a hierarchical statistical method for longitudinal analysis (HMLM) was used in the analysis of police arrest data from 5,871 cities during 1993 and 2000 when the involvement of Federal Government for promoting community policing or quality of life policing was unprecedented. The primary findings suggest a positive relationship between COPS hiring grants and all four types of police arrests during the period of study though COPS funding usually accounted for only a small percentage of the total budget in a police department (GAO, 2005). More specifically, the hiring grant, the largest part of the COPS funding project, had consistently significant impact on police arrests after controlling for the socioeconomic variables and crimes. In addition, the hiring grant was significant predictor of all four categories of arrests, indicating that additional manpower did have a direct casual relationship with number of police arrests. (Published Abstract)