Despite its potential, evidence-based policing has not rapidly diffused into American policing. There is little indication that most American police leaders and their agencies systematically or regularly use tactics that are evidence based. Instead, they continue to rely on strategies and tactics that are widely known to be ineffective or not based on systematic assessment. However, there is room for optimism.
Lum, C. (2009). Translating police research into practice. Police Foundation. https://www.policefoundation.org/publication/translating-police-research-into-practice/