Shelby Shamblin convicted in 1980 killing of Calif. woman, Elizabeth Crossman

(CBS/AP) MURRIETA, Calif. - Thirty-three years after the crime, a Riverside County jury has convicted a 50-year-old man of strangling a woman to death in her home in Hemet, Calif.

Prosecutors say jurors on Tuesday convicted Shelby Shamblin of one count of first-degree murder in the death of 67-year-old Elizabeth Crossman in January 1980.

They say a then-teenage Shamblin raped and killed Crossman after being hired to do odd jobs around her house. District attorney spokesman John Hall says a rape was alleged in court but not charged.

Prosecutors say a semen smear taken from the victim's body was submitted to a national database in 2002 and matched one taken from Shamblin when he was arrested on a drug charge in 2010.

Shamblin is scheduled to be sentenced Aug. 16.