DNA expert Alan Giusti's testimony came at the murder trial of Ingmar Guandique, who is charged with killing Levy back in 2001. Her disappearance became international news after she was romantically linked with Condit, a California Democrat. He was once the main suspect, but police no longer think he was involved.
Condit testified in the trial, but evaded questions about whether he had an affair with Levy.
Giusti testified that panties taken from Levy's condo in 2001 tested positive for sperm, and DNA linked it to Condit. Underwear found at the crime scene was also tested, but an initial test found nothing. However, a second test on the underwear six years later found male DNA, he said, but that it did not match Guandique. Prosecutors said the DNA hit was a result of contamination after the evidence was removed from Rock Creek Park.
The prosecution are dropping a sex assault charge and a murder charge, but four charges remain: kidnapping, robbery and two murder charges.
Levy's remains were found in the park a year after she disappeared. Despite extensive testing, no DNA from the scene has ever been linked to Condit or Guandique.