As a practical matter, it probably could not happen unless all senators agreed, and the idea of closed proceedings has already brought criticism.

The act provides for closed proceedings in which the defense must identify what classified information it proposes to use at the trial.

Two people have been sentenced thus far, both in closed proceedings beyond direct scrutiny by human rights groups and others.

He is now sorting through mountains of secret documents in closed proceedings to see whether, and in what form, the defense may use them.

The 17-year-old appeared in a closed proceeding and was ordered held at a jail for juveniles.

The spokesman did not give the vote of the closed proceedings.

Special advocates are generally prohibited from discussing any evidence that has been the subject of closed proceedings with the excluded party.

The defendants' appearance before the police and the judge were part of closed pretrial proceedings.

The asylum request was considered and rejected in closed proceedings.

His lawyers argued for a closed proceeding because pretrial publicity could prejudice jurors.