Although reward systems are utilized in prisons worldwide, evaluations regarding their intended use are lacking. This contribution reconstructs the policy theory of such a system: Promotion and Demotion, as implemented in Dutch prisons in 2014. With a policy scientific approach the intended target group, means, goals and causal mechanisms of the system were delineated. The policy theory assumes three means, ten goals and 24 causal mechanisms. The policy theory is insufficiently empirically substantiated on a number of points and takes limited account of (cognitively) impaired prisoners. This accurate reconstruction offers a unique insight into the assumed functioning of a part of Dutch detention policy and provides starting points for international considerations of behavioral change in detention.

Though less well-known than for instance the narcotics or weapons trade, illegal organ trade is a lucrative business with yearly revenues estimated between 840 million and 1.7 billion USD. The most commonly reported form of organ trade is the trade in living donor kidneys. The current study maps the criminal network behind the illegal organ trade that took place in the Medicus clinic in Kosovo based on police files, indictments, transcripts of suspect and victim statements, court rulings and interviews. The Medicus case involved at least 27 living kidney donations. Operations were performed by eleven actors in teams of varying composition. The total criminal network consisted of 107 individuals and is characterized by a low density and features a number of central actors.

It has been proposed that when people perceive their treatment by criminal justice actors as more procedurally just, they will be more likely to comply with the law. Existing research mainly focused on the police or the judge. This longitudinal study examined how prisoners experienced their treatment by five different criminal justice actors using data from the Prison Project. The prisoners were most positive about the procedurally fair treatment by their lawyer and least positive about the treatment by the police. Additionally, the perceived treatment by the police was associated with the treatment by other actors at subsequent moments.

In this essay the authors argue that social and genetic explanations for behavior are intertwined, and that genetically informed research designs can be a valuable addition to the toolbox that is available to criminologists for examining causal relationships and intergenerational transmission. From this ‘toolbox’ perspective, the authors discuss four study approaches: twin and family designs, genome-wide association studies, polygenetic scores and Mendelian Randomization. Finally, they address a number of practical considerations for applying genetically informed research designs in criminology.