Summary Box: Imprisoned Adelphia founder Rigas, son fight 2nd federal fraud trial

Summary Box: Rigases fight 2nd fraud trial in Pa.

THE DEFENDANTS: Adelphia Communications Corp. founder John Rigas, 85, and his son, 53, both already convicted in New York for fraud and conspiracy.

ROUND TWO: Prosecutors want to try both of them again, this time in Pennsylvania on charges of conspiring to avoid $300 million in taxes.

THE HURDLE: The defendants are fighting the charges on grounds they amount to constitutionally prohibited double jeopardy.