Connecticut prosecutor wants to continue keeping search warrants under wraps in the case of a newsman accused of trying to blackmail David Letterman.

CBS News producer Robert J. "Joe" Halderman has pleaded not guilty to trying to extort $2 million from the late-night TV host in return for keeping some of the comedian's sexual affairs quiet.

Prosecutor Suzanne Vieux (VEW') filed papers Wednesday arguing that unsealing search warrants could subject witnesses to media scrutiny and hurt the prosecution.

The search warrants involve Halderman's house in Norwalk and a 2006 Honda Accord.

The prosecutor also wants the courtroom closed during a hearing Thursday in Norwalk Superior Court.