Chandra Levy Murder Case: Attorneys for Ingmar Guandique question key witness testimony

Chandra Levy and her alleged killer Ingmar Guandique (CBS/AP)
Chandra Levy and her alleged killer Ingmar Guandique.

(CBS/AP) WASHINGTON - Lawyers for the man convicted of killing Washington intern Chandra Levy are going back to court, claiming Ingmar Guandique's conviction was "predicated on a lie."

Pictures: Chandra Levy Murdered

A Thursday hearing is scheduled for Guandique, an undocumented immigrant from El Salvador who was convicted in 2010 of killing the 24-year-old Levy in 2001. He is serving a 60-year prison sentence.

A judge closed recent hearings, though documents related to some of them were unsealed in February. The records show that government prosecutors asked to seal a Dec. 18 hearing to talk about information they learned after Guandique was sentenced.

They also show defense attorneys believe the information calls into question the testimony of a witness and that they plan to ask for a new trial.

It is not clear how much of Thursday's hearing may be open to the public and press.

Levy was an intern for the U.S. Bureau of Prisons whose 2001 murder attracted heightened attention because of her romantic relationship with then- congressman Gary Condit (D-Calif). Her body was found in Washington, D.C.'s Rock Creek Park.

Complete coverage of Chandra Levy on Crimesider