This article discusses relations between social science, education, and professional practice, and focuses on the impact of scientific research on police profession. The importance of knowledge transfer is clearly articulated in the strategic research agenda of the Dutch police. Police researchers are expected not only to do proper and relevant practice oriented research on aspects of security and policing, but also to contribute to the impact of scientific knowledge on the education of (future) professionals. This asks for an association with teachers, since they are in a key position regarding further knowledge transfer. Compelling examples of other sectors, like healthcare, may inspire the police to rethink key roles of teachers in that respect.

The fight against outlaw motorcycle gangs is high on the Dutch criminal justice agenda. Yet, much is unclear about the extent to which Dutch outlaw motorcycle clubs are involved in (organized) crime, and the exact role club membership plays in the crimes committed by individual members. This study analyses all court decisions between 1999 and 2015 that were made publicly available through the Rechtspraak.nl database to yield insight in the frequency and nature of (members of) outlaw motorcycle clubs’ court appearances. Results show that members of outlaw biker clubs are convicted for violence and drug offending. In a third of all incidents, fellow club members are among the co-offenders. Membership of an outlaw motorcycle club is often used to put pressure on victims. Non-members also make use of the violent track record of outlaw bikers.