A man has been arrested in connection with the 1981 murder of a 13-year-old Phoenix girl.
Maricopa County Sheriff's officials say 61-year old Raymond Diaz was linked by DNA evidence to the cold case.
They say Diaz is serving a lengthy sentence in an Arizona prison on convictions for kidnapping and sexual assault, among other crimes.
Diaz now has been charged with one count of first-degree murder in the death of Amy Yachimec.
It wasn't immediately clear Thursday if he has a lawyer.
Sheriff's investigators say Yachimec went missing from her family's Phoenix apartment in November 1981.
They say Diaz was considered a person of interest in the missing person investigation, but there was insufficient evidence for an arrest until DNA evidence linked him to the case in March 2015.