Washington ? Stymied police officers investigating the death of Chandra Levy said Thursday they have many more questions than answers and no real suspects.

A day after finding Levy’s remains in a heavily wooded area of Rock Creek Park, police and medical examiners don’t know how she died.

Washington police cadets prepare to continue searching for clues in the Chandra Levy case. They worked Thursday at Rock Creek park in Washington, where the remains of Levy were found Wednesday.

Detectives were mulling new interviews with old suspects Rep. Gary Condit and a man who attacked two joggers in the area last summer.

Washington Police Chief Charles Ramsey said police may conduct a fifth interview with Condit, who was having an extramarital affair with the federal intern when she disappeared a year ago.

Cops also may again question Ingmar Guandeque, 20, who was jailed July 1 for assaulting two joggers around Broad Branch Road in the park, near where Levy’s skeletal remains were found Wednesday with her running clothes and headphones.

Guandeque, who grabbed the women from behind, dragged them into the underbrush and menaced them with a knife, confessed to singling out women jogging with headphones on. He is serving 10 years.

Guandeque was looked at in the Levy case last year and cleared, according to the Washington and parks police.

“He was not a suspect and is not a suspect,” said Assistant Chief Terry Gainer, adding that detectives are “comfortable” that he was not involved.

But he said Guandeque would likely be reinterviewed “at some point.”

Condit’s lawyer, Mark Geragos, pounced on a Roll Call report about the Guandeque case, saying the jogger stalker is a far likelier suspect than his client.

“The logical explanation seems to be right in the back yard,” Geragos said. “What you’re going to see now is a lot of people with a lot of egg on their face who have been off running around after Gary Condit.”

The congressman lay low Thursday, deftly avoiding camera crews staking out his office and apartment.

In Modesto, Calif., the grieving Levys quietly planned a memorial service for their daughter next week.

“They’re not holding up very well at all,” said their lawyer, Bill Martin.

Martin said the Levys have been emotional since their daughter vanished May 1, 2001, but “this is the worst they’ve ever been.”

The parents had been clinging to wild speculation that their daughter had been kidnapped or sold into slavery.

“When they realized that they no longer had hope that their daughter would return and that she was, in fact, dead, they lost it,” Martin told NBC.

A turtle hunter’s dog found Levy’s scattered skeleton at the base of a steep cliff in a heavily wooded area.

Ramsey said it was under about a foot of foliage and undergrowth, far from any jogging trail.

There was no immediately obvious cause of death, and the medical examiner said a determination won’t be made until next week.

Pathologists, forensic anthropologists and insect experts were piecing the skeleton together, looking for clues to the time, cause and location of death. The best hope of finding evidence pointing to a suspect could be in the clothing, which may have retained hairs or fibers.

Though Guandeque said he was trying to steal headphones and pleaded guilty to assault with intent to rob, sentencing Judge Noel Kramer characterized his behavior as “predatory” because he stalked his victims and didn’t steal any property.

Both victims in last year’s May 14 and July 1 attacks were tall blondes who managed to fight off Guandeque.