The subject of human trafficking has recently received a lot of attention from society and the world of politics. The criminal-law approach to human trafficking has also been placed high on the agenda of law enforcers. Human trafficking is, however, a complex crime with several specific characteristics. For example, there is often a complex relationship between victims and perpetrators of human trafficking and victims are often too afraid to file a report. How do the police and the judicial authorities work in the investigation of human trafficking in view of the specific characteristics of human trafficking? What choices are made in practice and what different police investigative strategies can be distinguished? What opportunities and risks are inherent in the choices made? In this article we answer these questions on the basis of four large scale police investigations into human trafficking that we studied closely. The four criminal cases all focused on violent groups of human traffickers that operated in the Amsterdam window prostitution. All criminal cases have since been concluded (in first instance). It turned out that in each of the four investigations the relevant police team applied a different investigative strategy: one investigation focused primarily on the victim statements, one investigation focused on public nuisance, one investigation focused on the evidence against the criminal organisation and one investigation focused on the offences (evidence concerning the exploitation of prostitutes). In this article we compare the four strategies applied and consider the consequences of each strategy for the course of the investigation and the criminal prosecution and what dilemma's are faced in each strategy. Although the various investigations cannot be easily compared and a uniform 'best' strategy cannot be designated, the comparison does show that some choices or decisions entail great opportunities or great risks as regards the successful investigation and prosecution of human trafficking. It concerns, for example, the choice of involving local investigative services (district police) or the choice for short-term or, as the case may be, longer-running investigations. © 2011 Springer Science+Business Media, LLC.

Human trafficking Criminal investigation strategies organized crime

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