Attorneys revealed at a hearing Friday that the analyst contaminated the evidence with her own DNA. She has since been fired.
It was the latest mishap in a case riddled with mistakes since Levy disappeared in May 2001. A federal inmate, Ingmar Guandique was charged with Levy's murder.
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.