"I don't need to tell anyone here," he told the gathered press, "but the cases aren't always the way they are on TV where at the end of 60 minutes, there's a tidy piece of evidence… that cracks the case. Here, it was just the hard police work over the years, putting together different pieces of evidence."
Late last month, authorities indicated that their focus had narrowed to Guandique, who is eligible for parole in 2011. Investigators had ramped up their efforts in an attempt to secure charges against Guandique before his potential release from prison.
Levy's disappearance dominated headlines for weeks after it was revealed that the 24-year-old woman had been having an affair with then-California congressman Gary Condit.
Suspicion swirled around the Democrat, but Taylor said today that authorities believe that Levy "was a random victim of Guandique, who allegedly attacked and killed her as she walked or jogged" through the park.
The cloud hung over Condit for years and the scandal was widely considered the reason he lost his seat in Congress.
"For the Levy family, we are glad they are finally getting the answers they deserve. For my family, I am glad that their years of standing together in the face of such adversity have finally led to the truth," Condit told Washington, D.C., ABC News affiliate WJLA last month.
"It is unfortunate that an insatiable appetite for sensationalism blocked so many from searching for the real answers for so long. I had always hoped to have the opportunity to tell my side of this story, but too many were not prepared to listen. Now I plan to do so, but I will have no further comments on this story at this time," he said.
Condit, who now lives in Arizona, is believed to be mulling a book project.
Guandique attacked a woman two weeks after Levy's disappearance in the middle of May 2001 and another in July. The women were jogging in Rock Creek Park when he "clotheslined" them and dragged them down a hill.
Both women escaped and identified Guandique, who ultimately was caught and pleaded guilty. He's slated for release in 2010 after he finishes a 10-year sentence, which he is serving at the U.S. Penitentiary-Victorville in Adelanto, Calif.
Guandique was the focus of the last three parts of a 12-part series on Levy's disappearance in the Washington Post last year. He told the Post then that he had nothing to do with Levy's disappearance:
"Regarding the case of the girl, Chandra Levy: I don't know anything about that case. In 2001, the FBI went to see me when I was in the [D.C. jail]. That was when I learned about that girl," Guandique said.
"Before that, I had never seen her and I don't understand the reason why the police started to suspect me. ... I have nothing to do with the death of that girl. I am innocent and I am not afraid of the police investigation."
After the Post series, D.C. and FBI cold-case squad detectives reexamined their evidence. The problem had always been a lack of conclusive physical evidence to tie Guandique to the murder.