(2) Limitation on Separate Trials. Unless otherwise ordered by the court to promote justice, a defendant shall not be subject to separate trials for multiple offenses (a) based on the same conduct, (b) arising from the same criminal episode, or (c) based on a series of acts or omissions motivated by a common purpose or plan and which result in the repeated commission of the same offense or affect the same person or persons or their property, if such offenses are within the jurisdiction of the court and known to the United States Attorney at the time the defendant is arraigned on the first indictment or information.