The aim of the study was to illustrate how evidence-based praxis is implemented in the police agencies activities with crime prevention work. We asked two questions: a) What actions does the Swedish Police authority take when implementing evidence-based praxis in its operations? and b) What opportunities contra difficulties do the managers, community police officers and teachers at the police institute see with evidence-based praxis? This was investigated through qualitative interviews in order to capture the participants personal opinions and experiences about the subject. Evidence-based policies are practiced through the crime-prevention work that takes place through local cooperations. The role of community police officers constitutes an important strategic role as being cosmopolitan, which ensures that communication between the police and society works, which in turn forms the basis for the crime-prevention work. The result also shows that the police cannot take care of law enforcement on their own initiative; responsibility also rests on individuals, groups and other organizations. We see patterns of a majorly positive attitude within the police, which contradicts previous research. There are not enough evidence-based methods within all working fields of the police, which has emerged as an important factor in order to implement evidence-based praxis. Whilst the police may be positive towards evidence-based methods, they can not solely rely on them. The resources are too lacking in order for the evidence-based praxis to also permeate the police authority's work. In order for the police authority's work to be carried out by evidence-based methods, community police officers need to have a higher status internally. They also need a mandate in the form of being able to make decisions about operative resources. The main contribution of the study´s is that evidence-based praxis needs to be strategically implemented, and the key people who work primarily with evidence-based praxis needs a higher status within the organization.