An Arizona man has been nabbed in a cold-case investigation four decades after the body of a murdered 21-year-old woman was discovered in Nevada, officials said.

Charles Gary Sullivan, 73, was extradited Friday to Nevada from Arizona, where he was arrested in the 1979 slaying of Julia Howard, according to the Nevada Attorney General’s Office.

The break in the cold case came after authorities used DNA technology with the evidence, officials said.

Woodward was last seen alive in February 1979 at a San Francisco airport before heading to Nevada to look or job opportunities, authorities said.

She was discovered dead from blunt force trauma the next month in a shallow grave 15 miles north of Reno, the Las Vegas Review-Journal reported.

Woodward’s body was about a mile from another homicide victim, Jeannie Smith, whose remains were discovered buried in November 1979, the outlet reported. She also died from blunt force trauma and her case remains unsolved.

However, Sullivan hasn’t been charged in Smith’s death and police haven’t linked the two cases, the Las Vegas Review-Journal reported.

Authorities are expected to release more information about Woodward’s slaying after Sullivan’s arraignment, which is set for Tuesday in Washoe District Court, the outlet reported.

With Post wires