Vulnerable Witnesses in Practice of International Courts – Definition and Trauma as the Key Risk Factor

This paper offers a summary of a discussion on the definition of a vulnerable witness, a subject extensively explored by the author in her book ‘The Vulnerable Witness in the Practice of International and Hybrid Courts.’ While the paper specifically addresses trauma as a factor in determining witness vulnerability, the book encompasses a wider examination of various factors that contribute to the classification of a witness as vulnerable. Despite the frequent use of the term ‘vulnerable witness’, a clear and comprehensive understanding of its scope remains elusive. The discretion exercised by legal practitioners, especially judges, prosecutors, and investigators, in deciding whether to classify a witness as vulnerable, elicits concerns regarding the justice system’s capacity to meet the genuine needs of these individuals. There is a risk that the incorrect use of mechanisms intended for this group may compromise their welfare. Very often, it is precisely these witnesses who are pivotal in ascertaining the truth, owing to their direct knowledge of the facts concerning the events being investigated. Given the international community’s recognition of the threat to vulnerable witnesses and the need for special protection, this paper contributes to the discourse by examining key elements critical to the effective treatment of vulnerable witnesses in the context of criminal proceedings involving violations of international humanitarian law.