Attorneys handling the Chandra Levy murder case say an FBI forensic analyst mistakenly contaminated evidence from the site where the federal intern's body was found.

Click here for photos.

At a hearing Friday, attorneys revealed the FBI analyst mistakenly contaminated the evidence with some of her own DNA. She has since been fired.

It was the most recent mishap in a case riddled with mistakes since Levy disappeared in May 2001. A federal inmate, Ingmar Guandique, was charged with Levy's murder this year.

Public defender Maria Hawilo asked Judge Geoffrey Alprin to postpone the Jan. 27 trial to allow additional evidence testing. The judge declined but ordered that the evidence be made available for additional testing by the defense.

Another hearing is scheduled for Dec. 18.