MOSCOW, Idaho -

A man serving two life sentences for killing his ex-wife and her boyfriend is appealing a judge's ruling dismissing his petitions for post-conviction relief.

The Lewiston Tribune reports that Dale Shackelford filed the notice of appeal Friday in 2nd District Court.

Shackelford in 2000 was convicted of shooting Donna Fontaine and Fred Palahniuk to death in the northern Idaho town of Kendrick in 1999. He was sentenced to death.

However, the U.S. Supreme Court later ruled that juries, not judges, must hand down death sentences. At a new sentencing hearing Shackelford received two fixed life sentences.

He sought shorter sentences, but Latah County 2nd District Judge John R. Stegner dismissed the petitions for post-conviction relief two weeks ago.

Shackelford is appealing that decision.