Authorities trying to solve the disappearance of Nancy Guthrie say they might tap DNA genealogy databases, the same step that police took to unravel a decades-old series of murders in California and the fatal stabbings of four college students in Idaho.

The search for Nancy Guthrie is stirring memories of the Bike Path Rapist case in Western New York that was ultimately solved with the help of DNA evidence. Altemio Sanchez was convicted on four counts of second-degree murder,

James Oliver Unick, 64, was convicted of murdering 13-year-old Sarah Geer with a special circumstance related to the sexual assault on Friday. He will be sentenced to life without the possibility of parole, according to the Sonoma County District Attorney's Office.

Authorities have said they are looking to put DNA evidence from the case into “genetic genealogy” databases.

Nashville police use forensic genetic genealogy to identify remains found decades ago, solving multiple unidentified remains cases.

New DNA analysis has solved the 1987 killing of Rhonda Marie Fisher. A CODIS match linked evidence in the case to serial offender Vincent Darrell Groves. Officials say the breakthrough highlights ongoing efforts to resolve cold cases. DOUGLAS COUNTY, Colo.

Allegheny County’s longest cold case for an unidentified victim has been solved using DNA technology. On Wednesday, the Allegheny County Medical Examiner’s Office announced the body of an unknown homicide victim discovered over 30 years ago — described as a 5-foot-10 white male,