Linda O'Keefe was on her way home from a summer school in July 1973 when she was last seen alive. The next day they found the body of the eleven-year-old girl from the US state of California strangled in the city of Newport Beach.

More than 45 years after the violent death of the student, a suspect has been arrested in Colorado Springs. He is said to have lived in Southern California in the 1970s. With an old photo of the man now taken the investigators look for clues to the then committed crime.

The man is 72 years old today. A comparison with a DNA database for genealogical research, the investigators, according to "USA Today" last month on his track. Whether the suspect himself, whether relatives or acquaintances submitted the DNA sample of the man in database, is not known. One thing is clear: the DNA is in keeping with the traces of the murder of Linda.

"We have every opportunity in the world to solve as many of these cold cases as we had never hoped," said Orange County District Attorney Todd Spitzer, according to "USA Today," among the increasingly popular genealogy offerings.

AP / The Orange County Register

Prosecutor Todd Spitzer with investigators

A court in the state of Colorado has set a hearing date on February 28.