Here are the key events in the case involving the Virginia Democrats' conference calls last year.

March 22, 2002: Gov. Mark R. Warner, Democratic Party leaders, legislators and their lawyer have a telephone conference to discuss strategy in a court battle over state political boundaries.

March 25: Second Democratic conference call. Warner does not participate.

April 9: Edmund A. Matricardi III resigns as executive director of the state Republican Party after a Richmond Circuit Court grand jury indicts him on charges that he eavesdropped on the Democrats' calls and tried to use the contents of the calls.

April 17: Probe widens as investigators find the cell phone number of Claudia D. Tucker, chief of staff for then-Speaker S. Vance Wilkins Jr. (R-Amherst), among numbers logged into the March 25 Democratic conference call.

April 21: Wilkins puts Tucker on paid leave pending the outcome of the investigation.

May 14: State charges against Matricardi are dismissed as federal investigators take over.

Jan. 22, 2003: Tucker pleads guilty to a federal misdemeanor and is sentenced to a year of probation and fined $1,000. Matricardi is indicted on five federal charges involving the eavesdropping. He resigns as operations director of the South Carolina Republican Party.

Feb. 12: Matricardi pleads not guilty to all charges. U.S. District Judge James R. Spencer schedules an April 9 jury trial.

Feb. 28: Joseph Willis Lee III, a former aide to a Democratic state legislator, pleads guilty to helping arrange the eavesdropping. He agrees to cooperate with the federal investigation.

April 1: Matricardi pleads guilty to one felony count, interception of a wire communication. Sentencing is scheduled for July 8.