KALISPELL - A Bigfork man already faces federal prison time for sex crimes; and now he's pleaded guilty to molesting two young sisters in Flathead County.

Ralph Fox pleaded guilty this week to felony sexual assault and failure to register as a sex offender. He also pleaded guilty, through an Alford plea, to a second count of felony sexual assault. That means the defendant does not admit guilt, but does acknowledge enough evidence exists to convict him.

Prosecutors believe 50-year-old Fox inappropriately touched a 6-year-old girl and her 10-year-old sister between June 2005 and December 2006.

It's also alleged he took pictures of them in various stages of undress.

He's to be sentenced July 30.