145. The Appeals Chamber recalls that a Trial Chamber may enter a conviction on the “basis of a single witness, although such evidence must be assessed with the appropriate caution, and care must be taken to guard against the exercise of an underlying motive on the part of the witness.”[1] The Appeals Chamber further recalls that “a Trial Chamber should at least briefly explain why it accepted the evidence of witnesses who may have had motives or incentives to implicate the accused; in this way, a Trial Chamber shows its cautious assessment of this evidence.”[2] [see also para. 242 of the Appeals Judgement]

219. The Appeals Chamber recalls that a Trial Chamber is at liberty to rely on the evidence of a single witness when making its findings.[3] The testimony of a single witness may be accepted without the need for corroboration, even if it relates to a material fact.[4] […]

63. Trial Chambers are best placed to hear, assess and weigh the evidence, including witness testimonies, presented at trial.  Whether a Trial Chamber will rely on single witness testimony as proof of a material fact, will depend on various factors that have to be assessed in the circumstances of each case.[1]  In a similar vein, it is for a Trial Chamber to consider whether a witness is reliable and whether evidence presented is credible.  The Appeals Chamber, therefore, has to give a margin of deference to the Trial Chamber’s evaluation of the evidence presented at trial.  The Appeals Chamber may overturn the Trial Chamber’s finding of fact only where the evidence relied on could not have been accepted by any reasonable tribunal[2] or where the evaluation of the evidence is wholly erroneous.