Police worked through the night in Washington's Rock Creek Park, searching under lights for more clues in the investigation of the death of Chandra Levy, and they are expected to continue combing the area into Friday.
The remains of the former federal intern, who had been missing for more than a year, were found in the park early Wednesday. Public confirmation of her identity came several hours later with the help of dental records.
The 24-year-old California native was last seen on April 30, 2001, and last heard from in an e-mail to her parents the following day.
Investigators are not yet treating the case as a homicide, and the cause of death is pending a coroner's investigation.
"The medical examiner has not yet determined manner and cause of death," Metropolitan Police Chief Charles Ramsey said today on ABCNEWS' Good Morning America. "So right now, it's a death investigation. However, like all death investigations, we make a presumption that it's perhaps a homicide, so we cover everything that needs to be covered."
Police have asked a Smithsonian Institution anthropologist to help them determine what caused the death.
"It becomes more difficult, but it's not impossible," Ramsey said. "It's been done in the past."
Still, police do not have much to work with. All that was found were a skull and some bones, with no flesh or organs, and some jogging clothes and a Walkman radio, police said. Law enforcement sources told ABCNEWS that Levy's remains are so decomposed they may never learn how she died.
Police will also go back and conduct new interviews with people involved with the case. They may also question people not previously interviewed to try to determine whether anybody "saw anything a bit unusual but never paid any attention to it until now," Ramsey said.
Park Police Lt. Joseph Cox, the commander of the Rock Creek Park precinct, told The Associated Press that Metropolitan Police have questioned a man who is serving a 10-year sentence for assaulting a jogger in the park last year. Cox would not say when the interview occurred, according to the news agency.
A spokesman for the Metropolitan Police Department would not comment on the report.
The Levy case generated national headlines after reports surfaced that the young woman had been linked to Rep. Gary Condit, D-Calif. More than 200 members of the media arrived in Rock Creek Park within hours of the announcement that a body had been found there.
Park Had Been Searched Before
Levy's remains were found Wednesday morning by a man walking his dog, looking for turtles in the 1,754-acre park.
Levy's apartment was near the park, and it was searched by police three times last summer after analysis of her computer revealed that she had done a search for directions to the Klingle Mansion, a historic home in Rock Creek Park, the day she disappeared.
The remains were found about a mile from the mansion, but Ramsey said there were many reasons why they might have been missed — including the possibility that the body was not there at all when police scoured the area a year ago.
"With the heavy foliage and underbrush, it's in a very remote area on a very steep incline, it's very possible to miss something, presuming it was there at the time the search was conducted and not left after the search," the police chief said.
"You are talking 1,700 acres of park land, and dogs can only work for so long, and we did cover parts of the park with cadaver dogs," he added.