It was a year ago that Steven Powell shocked the world by claiming he was involved in a sexually-charged relationship with Susan Powell.
"We interacted in a lot of sexual ways because Susan enjoys doing that. I enjoy doing that," he said in August 2011.
Susan's family denies that claim, saying she felt uneasy around her father-in-law.
Detectives say that perverse relationship came to light as they investigated Susan's disappearance from her Utah home in December 2009. Investigators came across Steven Powell's journals, which detailed his obsession with Susan.
In one of the 2,300 pages spanning 17 spiral notebooks, Steven Powell wrote, "The fact is, I can hardly control myself when it comes to her."
He also detailed how he liked to photograph Susan when she wasn't watching. The journals include dozens of photos of Susan, and while some were innocent, many others zeroed in on her legs and feet. Powell also wrote about using a mirror under the bathroom door to spy on Susan.
Later, he admits to feeling guilty about the action, saying it " ... represents the first time I've mentioned fetishes and what might be considered sociopathic. I mean, who looks under the bathroom door with a mirror?"
The journal entries and photos stopped just before Susan disappeared, and there's no mention of what happened to her.
"There's nothing in the diary that's going to lead anybody anywhere to find Susan's body," said Pierce County sheriff's spokesman Ed Troyer. "It's just disturbing reading."
Despite the lack of information in the journals, Susan's family believes Steven Powell knows what happened. But if he does know what happened to his daughter-in-law, he's not telling. He's said nothing to police or anyone else since his arrest and conviction for voyeurism of two neighbor girls.
Steven Powell is currently serving a prison sentence in state prison in Shelton, but he could be released as soon as next May.