Rule 14 of the Federal Rules of Criminal Procedure . . . [citations omitted] The existence of prejudice, in large measure, depends upon the facts and circumstances of each case . . . [citations omitted] and it is axiomatic that the granting of a severance is within the discretion of the trial judge . [citations omitted] The burden of demonstrating prejudice is a difficult one, and the ruling of the trial judge will rarely be disturbed on review [citations omitted] The defendant must show something more than the fact that ‘a separate trial might offer him a better chance of acquittal’. . . . [citations omitted) “Appellants alleged that they were prejudieed'and their trial rendered unfair because the jury was unable to collate the evidence and connect the names and faces of each d d 409
holding that an accused cannot sustain a speedytrial claim when delay results from his    making dilatory pleadings or motions failing to object when a continuance is granted the government    holding that delay is waived when the defendant fails to object when a continu ance is granted holding that delay is waived when the defendant makes dilatory pleadings and motions holding defendant waived complaint holding that although the defendant filed a number of motions because the original trial date never changed as a result of those motions no delay could be attributed to the motions