Considering that the Appeals Chamber takes the view that it is necessary to consider, inter alia, the following factors when determining whether there has been a violation of the right to be tried without undue delay:

(1)     The length of the delay;

(2)     The complexity of the proceedings, such as the number of charges, the number of accused, the number of witnesses, the volume of evidence, the complexity of facts and law;

(3)     The conduct of the parties;

(4)     The conduct of the relevant authorities; and

(5)     The prejudice to the accused, if any;

 CONSIDERING that the Trial Chamber erred in considering the factor of the fundamental purpose of the Tribunal in its determination of whether the delay was undue;

102.  Participation in a joint criminal enterprise is a form of “commission” under Article 7(1) of the Statute.  The participant therein is liable as a co-perpetrator of the crime(s).  Aiding and abetting the commission of a crime is usually considered to incur a lesser degree of individual criminal responsibility than committing a crime.  In the context of a crime committed by several co-perpetrators in a joint criminal enterprise, the aider and abettor is always an accessory to these co-perpetrators, although the co-perpetrators may not even know of the aider and abettor’s contribution.  Differences exist in relation to the actus reus as well as to the mens rea requirements between both forms of individual criminal responsibility:

(i) The aider and abettor carries out acts specifically directed to assist, encourage or lend moral support to the perpetration of a certain specific crime (murder, extermination, rape, torture, wanton destruction of civilian property, etc.), and this support has a substantial effect upon the perpetration of the crime.  By contrast, it is sufficient for a participant in a joint criminal enterprise to perform acts that in some way are directed to the furtherance of the common design.

(ii) In the case of aiding and abetting, the requisite mental element is knowledge that the acts performed by the aider and abettor assist the commission of the specific crime of the principal.  By contrast, in the case of participation in a joint criminal enterprise, i.e. as a co-perpetrator, the requisite mens rea is intent to pursue a common purpose.

120. The Appeals Chamber further recalls that the standard of proof to be applied is beyond a reasonable doubt, and the burden lies on the Prosecution as the accused enjoys the benefit of the presumption of innocence. The Appeals Chamber agrees with the test adopted by the Trial Chamber according to which, when the Prosecution relies upon proof of the state of mind of an accused by inference, that inference must be the only reasonable inference available on the evidence.[1]

16.     The Prosecution is certainly correct that the Trial Chamber must consider all of the circumstances bearing on a motion to amend the indictment.  Interference with the orderly scheduling of trial, however, is one such circumstance.  The Appeals Chamber stated in Karemera that “a postponement of the trial date and a prolongation of the pretrial detention of the Accused” are “some, but not all”[1] of the considerations relevant to determining whether a proposed amendment would violate the right of the accused to a trial “without undue delay,”[2] which in turn bears on the broader question whether the amendment is justified under Rule 50 of the Rules. The Trial Chamber should also consider such factors as the nature and scope of the proposed amendments, whether the Prosecution was diligent in pursuing its investigations and in presenting the motion, whether the Accused and the Trial Chamber had prior notice of the Prosecution’s intention to seek leave to amend the indictment, when and in what circumstances such notice was given, whether the Prosecution seeks an improper tactical advantage,[3]and whether the addition of specific allegations will actually improve the ability of the Accused to respond to the case against them and thereby enhance the overall fairness of the trial.[4] Likewise, the Trial Chamber must also consider the risk of prejudice to the Accused and the extent to which such prejudice may be cured by methods other than denying the amendment, such as granting adjournments or permitting the Accused to recall witnesses for cross-examination.[5] The above list is not exhaustive; particular cases may present different circumstances that also bear on the proposed amendments.

 17.     […] [T]he Trial Chamber is not required to enumerate and dispose of all of the arguments raised in support of a motion.  Absent a showing that the Trial Chamber actually refused to consider any factors other than the determination that the amendment would delay the start of trial, or a showing that the Trial Chamber’s conclusion was so unreasonable that it cannot have considered all pertinent factors, the Appeals Chamber must conclude that the Trial Chamber took account of all of the arguments put to it.

[…]

19. […] Although the Prosecution may seek leave to expand its theory of the Accused’s liability after the confirmation of the original indictment, the risk of prejudice from such expansions is high and must be carefully weighed. On the other hand, amendments that narrow the indictment, and thereby increase the fairness and efficiency of proceedings, should be encouraged and usually accepted.

19. With regard to the question whether Prosecution submissions fall within the scope of Rule 68 of the Rules, the Appeals Chamber recalls that the Prosecution is required pursuant to Rule 68 of the Rules to disclose material “[…] which in any way tends to suggest the innocence or mitigate the guilt of the accused […].” As a general rule, this obligation does not extend to interpretations and arguments based on such material made by the Prosecution and Blaškic in their “submissions, filed under seal”, as requested by the Appellant.[1] However, in extraordinary cases in which evidence becomes exculpatory only in connection with such a submission, the Prosecution has the obligation to disclose this submission pursuant to Rule 68 of the Rules. In this respect, the Appeals Chamber also recalls Rule 70 (A) of the Rules:

Notwithstanding the provisions of Rules 66 and 67, reports, memoranda, or other internal documents prepared be a party, its assistants or representatives in connection with the investigation or preparation of the case, are not subject to disclosure or notification under those Rules.

20. […] If evidence in open session testimony in other trials becomes exculpatory only in conjunction with closed session testimony that was not disclosed, the exculpatory nature of such evidence given in open session is unknown to an appellant, and the Prosecution has the obligation to disclose the open session testimony given in other trials that can only be understood in context.

19. There is no doubt that, by choosing to conduct his own defence, the Accused deprived himself of resources a well-equipped legal defence team could have provided. A defendant who decides to represent himself relinquishes many of the benefits associated with representation by counsel. The legal system’s respect for a defendant’s decision to forgo assistance of counsel must be reciprocated by the acceptance of responsibility for the disadvantages this choice may bring.[1] Where an accused elects self-representation, the concerns about the fairness of the proceedings are, of course, heightened, and a Trial Chamber must be particularly attentive to its duty of ensuring that the trial be fair.

13.     Rule 93 provides that “Evidence of a consistent pattern of conduct relevant to serious violations of international humanitarian law under the Statute may be admissible in the interests of justice.” Rule 93 does not create an exception to Rule 89(C), but rather is illustrative of a specific type of evidence which may be admitted by a Trial Chamber. Rule 93 must be read in conjunction with Rule 89(C), which permits a Trial Chamber to admit any relevant evidence which it deems to have probative value. Even where pattern evidence is relevant and deemed probative, the Trial Chamber may still decide to exclude the evidence in the interests of justice when its admission could lead to unfairness in the trial proceedings, such as when the probative value of the proposed evidence is outweighed by its prejudicial effect, pursuant to the Chamber’s duty to ensure a fair and expeditious trial as required by Article 19(1) of the Statute of the International Tribunal.

See also para. 14.

17.     […] [T]he Prosecutor alleges that the Trial Chamber erred by compartmentalizing its analysis of probative value. The Appeals Chamber affirms that the correct approach is to assess the aggregate probative value of the particular evidence against its aggregate prejudicial effect. […]. 

9. Because the question whether to grant leave to amend the indictment is committed to the discretion of the Trial Chamber by Rule 50 of the Rules, appellate intervention is warranted only in limited circumstances.  As the Appeals Chamber of the International Criminal Tribunal for the former Yugoslavia (“ICTY”) has explained, the party challenging the exercise of a discretion must show “that the Trial Chamber misdirected itself either as to the principle to be applied, or as to the law which is relevant to the exercise of the discretion, or that it has given weight to extraneous or irrelevant considerations, or that it has failed to give weight or sufficient weight to relevant considerations, or that it has made an error as to the facts upon which it has exercised its discretion.”  If the Trial Chamber has properly exercised its discretion, the Appeals Chamber may not intervene solely because it may have exercised the discretion differently.  However, if the Trial Chamber has committed an error that has prejudiced the party challenging the decision, the Appeals Chamber “will review the order made and, if appropriate and without fetter, substitute its own exercise of discretion for that of the Trial Chamber.”

12.  […] The Prosecution is entitled to decide that its theory of the accused’s criminal liability would be better expressed by an amended indictment.  Even if the trial can proceed on the basis of the Current Indictment, the Prosecution is not thereby precluded from seeking to amend it.