Authorities appealed to the public for information Tuesday after a nine-month investigation on the death of former Penthouse model, Anneka Vasta, who was found washed up on a Camp Pendleton, Calif. beach. Joggers found the model's naked body with a broken neck and back on the Marine training beach on Jan. 4, 2011.

Military police initially thought Vasta was a teenager because of her slender and youthful body, reported the San Diego Union-Times.

Police are still trying to establish whether Vasta's death was a suicide, accidental death or foul play. Her family vehemently denies that Vasta could have committed suicide, the San Diego Union-Times reported.

Vasta, formerly known as Anneka Di Lorenze in her modeling days, lived a glamorous B-list Hollywood life in the 1970s and 80s. She was named Penthouse Pet of the Year in 1975 and appeared in Bob Guccione's infamous soft-core porn films, Caligula. According to MSNBC, the film is famously known because Roger Ebert walked out of it, later awarding the film zero stars and describing the film as sickening, utterly worthless, shameful trash.

Much later in her life, Vast won $4 million in a landmark sexual harassment suit in New York after Penthouse publisher Guccione, whom she dated, forced her to have sex with two of his business associates.

Federal investigators remain clueless in the 58-year-old's death. The Navy Criminal Investigation Service has asked the public if anyone recalls seeing Vasta along Interstate 5, where her car was parked, according to the San Diego Union-Tribune.

After 9 months of investigation, police can still not determine how Vasta's body got from the vantage point 60 feet above sea level where her car was parked, to the rocky, sandy beach below, over a mile south.

Investigators believe that had Vasta jumped from the scenic vantage point where her car was park, she would not have made it to the beach because the tide is not high enough at that location, If Vasta had jumped, investigators do not believe her body would have hit water, explained the San Diego Union-Tribune.  

We know her life ended in the water, in some circumstance, we just don't know how, said Special Agent Rachel McGranaghan.

When investigators discovered Vasta's maroon 2011 Mazda 626 sedan perched along Interstate 5, they also found a blood-stained leopard-print blouse and a sports bra in the car.  A steak knife with Vasta's blood was found by the passenger floorboard. Lithium and an empty bottle of Xanax were also found strewn in the car, but no drugs were found in her body after an autopsy was completed.

The autopsy report did, however, show a shallow wound on her wrist (which may indicate a half-hearted attempt at suicide) and stab wounds in her chest.

Vatsa was known for being extremely open to strangers and family members worry that she may have been in the car with someone she had met that New Year's Eve weekend.

Still, investigators say there are no signs that Vasta was sexually or physically assaulted in her final hours.