PASCO, Wash. (AP) — A man convicted of killing a Superior Court judge with a pipe bomb in 1974 is asking a court to allow DNA testing on evidence from his case.

The Tri-City Herald reports ( ) that attorneys with the Innocence Project Northwest are representing Ricky Anthony Young.

He is serving a minimum 77-year sentence for first-degree murder in the death of Benton-Franklin Superior Court Judge James Lawless. The judge opened a small package and triggered a pipe bomb that killed him in his court chambers in June 3, 1974.

Two partial fingerprints matching Young were discovered by federal agents underneath tape on a piece of paper from the package.

In their motion, Young's attorneys wrote that DNA testing wasn't available at the time of his trial 40 years ago. They say it has the potential to exonerate him and identify the true perpetrator of the crime.

A hearing is set for Tuesday in Franklin County Superior Court.