Steven Powell has been found guilty of possessing child pornography.

Powell, whose daughter-in-law Susan Powell went missing in Utah six years ago, was on trial for possessing explicit images of two neighbor girls. The 64-year-old's trial began last week and jurors returned a unanimous verdict Monday afternoon.

Powell was convicted in 2012 on 14 counts of voyeurism for shooting video and still pictures of the girls, ages 8 and 10, from a window as they used a family bathroom. A judge threw out the child porn charges before the voyeurism trial, but they were reinstated by an appeals court.

Powell is the father of Josh Powell, who killed his two sons and himself in February 2012 while under investigation for the 2009 disappearance of his wife.