I. Lewis "Scooter" Libby lied to the FBI and a grand jury about how he heard that Valerie Plame was a CIA operative, a prosecutor told the jury Tuesday in the perjury trial of Vice President Dick Cheney's former aide.

NBC's Tim Russert, the last prosecution witness in Lewis "Scooter" Libby's perjury trial, testified Wednesday he did not inform Libby of CIA operative Valerie Plame's identity, as Libby has claimed.