See Federal Rules of Criminal Procedure Joinder of two or more offenses in same indictment, Rule 8(a). Trial together of indictments or informations, Rule 13.
See Federal Rules of Criminal Procedure Joinder of two or more defendants charged in same indictment, Rule 8(b). Relief from prejudicial joinder, Rule 14.
See Federal Rules of Criminal Procedure Dismissal filed by Attorney General or United States Attorney, Rule 48. Dismissal on objection to array of grand jury or lack of legal qualification of individual grand juror, Rule 6(b)(2).