The Working Group on Arbitrary Detention’s Treatment of Evidence: A Three-Phase History of Increasing Sophistication

This chapter reviews the Working Group on Arbitrary Detention’s (WGAD) approach to issues of evidence and burdens of proof. It aims to provide a useful point of comparison with the UNTBs’ evidentiary procedures. The WGAD has developed an increasingly sophisticated approach to evidence, providing strong incentives for other decision-making bodies to take up its conclusions and procedures. In this chapter, the following arguments are substantiated: first, that the Working Group’s increasingly formalised and standardised approach to evidence reflects the maturing of the Working Group and its entrenchment in the ecosystem of human rights bodies; second, that its nuanced evidentiary approach can serve to enhance its credibility with states and claimants, in order to increase compliance rates; and third, its detailed approaches to evidentiary standards and challenges could provide precedents for UNTBs with individual claims mandates to follow a similar approach.