Ruby v. Giles

defendants alleged that sales of silver options, refining contracts and a Bahamian loan swindle were separate conspiracies | general verdict vacated where evidence impermissibly admitted as proof of contract breach, though admissible to prove fraud and impossible to determine on what basis jury grounded its verdict | verdict in civil trial not reliable because it could have rested on improperly admitted parole evidence | convictions for conspiracy to commit bank larceny affirmed where circumstantial evidence suggested “some communication” | letter need not show on its face that it is in furtherance of scheme | special verdicts especially suited to multiple theories of liability | coercive interrogation of employees prohibited