The following guest post was written by Jelia Sane and Chiara Gabriele. Jelia Sane is a barrister at Doughty Street Chambers, London, specialised in the areas of international criminal law, international humanitarian law and human rights. Chiara Gabriele is a Legal Advisor for the Great Lakes program at TRIAL International. She joined the NGO in 2015 and has been based in Bukavu (DRC) since 2017.
International criminal courts and tribunals (ICTs) have long admitted audiovisual material in evidence, including photographs, videos and audio recordings. Photographs and moving images have been relied on since the first war crimes trials at Nuremberg. In the 1990s, the International Criminal Tribunal for the former Yugoslavia (ICTY) and the International Criminal Tribunal for Rwanda (ICTR) considered satellite imagery and film footage captured by journalists, amongst others.
More recently, the establishment of the International Criminal Court (ICC), Special Court for Sierra Leone (SCSL), and Special Tribunal for Lebanon (STL) has coincided with the popularisation of the internet, in particular of social media, along with the proliferation of mobile phone and communications technology. Individuals are increasingly uploading potentially relevant and probative evidence of international crimes online, especially on social media platforms. Indeed, to date, over 4 million videos of the Syrian conflict have been uploaded on YouTube alone. There are more hours of footage of the Syrian conflict than have passed since the war began in 2011. ICC investigators and prosecutors are increasingly collecting user-generated digital and open-source evidence for use at trial. The Office of the Prosecutor collected digital evidence for the first time in 2008 in the Bemba case and video evidence was introduced in Prosecutor v Thomas Lubanga Dyilo, the first trial before the Court. By 2011, this kind of evidence had been collected in the Kenya, Ivory Coast and Libya investigations. The Court now has an ‘e-Court Protocol’, designed to ensure the “authenticity, accuracy, confidentiality and preservation” of the record of court proceedings.
Audio-visual evidence can be a valuable source of evidence in international criminal trials. Footage from mobile phones, photographs, and videos can link a suspect to the scene of a crime; pinpoint the time and place of an incident; capture dimensions of an event that may lie beyond the recollection of a witness; and provide a credible, real-time, and objective record of a situation. The risk that information will be lost, manipulated, or destroyed is reduced, particularly in cases where evidence is preserved in a digital format. At the same time, the widespread availability of audio-visual technologies and the proliferation of “citizen” journalists and “user generated” material can raise thorny evidentiary challenges for courts, in terms of establishing provenance, authenticity, and chain of custody, amongst others. These challenges have yet to be specifically addressed in the procedural rules of the ICTs, whose approach to date has largely been to assess evidence of this nature on a case by case basis and by reference to the standard rules and principles applicable to other forms of evidence.
Audio-visual material is generally admitted as a form of documentary evidence. The term “document” has been broadly interpreted in this context to mean “anything in which information of any description is recorded”, this encompasses paper documents as well as photographs and the content of audio and video recordings If the material is stored on, received, or transmitted by, an electronic device such as a smartphone, it will also be considered as digital evidence. In both cases, the “document” itself may also be preserved as physical evidence. As with other types of evidence, there are no universal standards governing the admissibility of audio-visual material. However, the admissibility threshold in ICTs is generally low relative to that of national systems, particularly common law jurisdictions.
Trial judges at the ICC for example have wide discretion to admit any evidence provided that it is (i) prima facierelevant; (ii) prima facie probative; and (iii) sufficiently relevant and probative as to outweigh any prejudicial effect its admission may cause. Relevance turns on whether the evidence makes “the existence of a fact in issue more or less probable”. Probative value is considered in terms of the reliability and authenticity of the evidence, as well as the extent to which it is likely to influence the determination of a fact at issue. This is a fact-specific inquiry that takes into account numerous factors, including the origin, form, content and date of the documentary evidence; where and in what circumstances it was seized; the chain of custody after seizure; the corroboration of the contents of the document with other evidence; and the nature of the document itself (e.g. whether it contains any signatures or stamps). Trial judges must also consider the potentially prejudicial effect of admission. Open source or user-generated evidence may raise specific challenges in this regard. For example, if a video is exceedingly graphic, or attacks the character of the accused without shedding much light on the facts in issue, it may be excluded as prejudicial. As for evidentiary weight, this will turn on the intrinsic quality of the evidence and on the totality of the evidence admitted at trial. Continue reading










