This article aims to explore the driving factors behind the process of crimmigration, the merger of crime control and migration control. By analysing the legal and policy framework governing the so-called ‘Mobile Security Monitor’ – the discretionary immigration checks carried out by the Royal Netherlands Marechaussee in the borderlands with Belgium and Germany, the research explores the extent to which the framework might leave room for crimmigration-based decisions on the street level. As the article shows, the dual nature of the Mobile Security Monitor as both an instrument for immigration control and crime control combined with an important name-change and the ongoing securitization of migration in Europe seem to create a favourable environment for crimmigration.

Since November 2009, the regional police of Groningen facilitated their community officers with Twitter. According to the principles of community policing, they are enabled to shorten the distance between the police and citizens by giving them a direct connection. Such a connection should stimulate interaction, while at the same time it should make people feel more safe. In addition, Twitter also creates possibilities for the police to be transparent. Sharing of information should alter citizens’ perception towards the police.
A comparison has been made, by using an online questionnaire, between followers and two kinds of non-followers. The effects of following twittering community officers have been demonstrated by using statistical analyses, taking into account relevant control variables. On the basis of these analyses it has been demonstrated that following a twittering community officer did not positively or negatively alter the perception of safety of their followers. However, an enhanced information position has made followers much more aware of local disorder and crime. Thanks to shared information about police actions to sustain and improve local safety and livability, followers’ perception of safety has not been altered negatively.
Followers’ perception towards the police organization has been positively altered, thanks to the twittering community officers. Especially the sharing of information and involving citizens into local policing helps the police to alter the perception of citizens towards their organization. In addition, it has been shown that followers’ willingness to report has been improved. Thanks to the ease of use of Twitter and the shortened distance between the police and citizens, followers do frequently contact the police or a community officer to share some information, or to report some crime or disorder. However, it has been shown that Twitter should just be presented as complementary to existing ways to contact the police.