DNA evidence shows that Twylia May Embrey of Arthur County, Neb., was not the woman discovered by a pair of University of Colorado students on April 8, 1954, investigators said.

Sheriff Joe Pelle said detectives are looking into about a dozen other leads.

Embrey had been "the most promising," he said, because family members recalled her as liking Colorado and the mountains.

Jane Doe's naked, decomposed body was found at the bottom of a 29-foot embankment beside Boulder Creek, about nine miles up the canyon.

The sheriff's office reopened the case last year at the urging of local historians, who believed DNA evidence might resolve the longstanding mystery.

A North Platte, Neb., family contacted the sheriff's office even before the sculpture was unveiled last month. They noted that Embrey had disappeared in the early 1950s.

Pelle said at the time that a photograph of Embrey did not fit the reconstructed skull, but ordered DNA testing to be sure.