Fong returned the money in April 1997 .
Suspect contributions associated with Sioeng include $250,000 to the DNC and $100,000 to Republican California State Treasurer Matt Fong .
State Treasurer returned the money in April 1997 .
Suspect contributions associated with Sioeng include $250,000 to the DNC and $100,000 to Republican California State Treasurer Matt Fong .