BRISBANE -- The woman's bones discovered on a bayfront hillside had been there over five years before a strange and violent string of events led police to them last month.

That span of years was among the new details police released Wednesday about the mystery woman, who remains unidentified since being uncovered Jan. 16.

Brisbane police Cmdr. Robert Meisner also revealed the woman was believed to be between 5-foot-3 and 5-foot-6. Authorities think she was 33 to 46 years old when she died, though how she died remains unknown.

Police were guided to the bones, found on a vacant property southwest of Bayshore Boulevard and Old County Road, through a series of steps that started Nov. 16. On that day someone called police to report a man was walking around with a human skull in a residential neighborhood on Visitacion Avenue.

Officers found 56-year-old Joseph Carrabino, who was carrying a cranium, and got into a struggle with him. He was arrested for resisting arrest and initially didn't provide police much information about where he found the skull.

After he got out of jail about two months later, Carrabino led officers to the bones. Police have declined to say if he's believed to have anything to do with her death. For the moment investigators haven't even determined if she was killed.

The coroner's office has sent the bones for DNA testing, which authorities hope will reveal the woman's name. In the meantime, investigators have begun wading through missing-person reports in an attempt to identify her.

Anyone with information can call Brisbane police at 415-467-1212.

Contact Joshua Melvin at 650-348-4335. Follow him at Twitter.com/melvinreport.