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Steven Powell is appealing his conviction on voyeurism charges.

Powell, father-in-law of missing West Valley City woman Susan Powell, filed a notice of appeal Friday in the Pierce County Superior Court in Tacoma, Washington.

That same day, a judge sentenced Powell to 30 months in prison and 36 months of probation for photographing two neighbor girls, then 8 and 9, through their window as they bathed and used the toilet in their Puyallup, Wash., home.

A jury in May convicted Powell of 14 counts of voyeurism, but two of those counts were dismissed after the trial. Washington's voyeurism law says each count should reflect a different photo session, and prosecutors admitted two photographs were from the same session and dismissed one count. The judge dismissed the second count.

One of Steve Powell's attorneys, Mark Quigley, had said his client would appeal on the grounds the search of Powell's home, which turned up digital evidence used to prosecute him, was illegal. A judge rejected that argument before his May trial.

Powell's son, Josh Powell, was the only person of interest in the December 2009 disappearance of his wife. Then on Feb. 5 of this year, Josh Powell killed the sons he had with Susan, 7-year-old Charlie and 5-year-old Braden, and himself in a fire in Graham, Wash.

Erin Alberty