27 60. The Defence asks the Appeals Chamber to reverse the Trial Chamber’s finding that the Appellant is guilty of the murders of Edic Besi} and the man identified by the name of Osman.94 2. The Prosecution 61. The Prosecution argues that the Appeals Chamber, being an appellate body, cannot reverse the Trial Chamber’s findings of fact unless it were to conclude that the Defence has proved that no reasonable person could have come to the conclusion reached by the Trial Chamber based on the evidence cited by it. 95 62. The Prosecution claims that the Defence misrepresented the Trial Chamber’s findings with respect to Dragan Opaci} in order to taint Mr. Seferovi} by association as an unreliable witness. Having lied about his family situation, Mr. Opaci} had clearly aroused the Prosecution’s fears about his credibility. Consequently, he was withdrawn as a witness as a precautionary measure. The Trial Chamber asked the Prosecution to investigate this matter and, having examined the situation, the Prosecution found that the investigation did not support the Defence allegation that Mr. Opaci} was planted by the Bosnian government. 63. The Prosecution submits that the attempt to taint Mr. Seferovi}’s credibility by assimilating his position to that of Mr. Opaci} fails because the Trial Chamber concluded that the circumstances surrounding the testimony of the latter were unique to him. The situation of Mr. Seferovi} was not similar to that of Mr. Opaci}. There was no need to require corroboration of his testimony because the Trial Chamber concluded that he was a reliable witness. B. Discussion 64. The two parties agree that the standard to be used when determining whether the Trial Chamber’s factual finding should stand is that of unreasonableness, that is, a 94 In its submissions, the Defence refers to the victim identified by the Trial Chamber only as one “Osman”, by the name “Osman Didovic”. The Appeals Chamber is not here called upon to determine whether the name thus given by the Defence is accurate. Case No.: -94-1-A 15 July 1999