Susan Powell and her father-in-law, Steven Powell
Hardman Photography/AP; ABC News
02/08/2012 AT 08:30 AM EST
Following the horrific double-murder-suicide
of Josh Powell and his two young sons on Sunday, police have called Josh's father, Steven Powell, a person of interest in the 2009 disappearance
of Josh's wife Susan.
Police are not calling the elder Powell a suspect at this time, but believe he may know something about what happened to his daughter-in-law, according to Utah's KSL.com
"They lived together in the house," West Valley City, Utah, police chief Buzz Nielsen tells KSL. "There are things he should want to talk to us [about], we hope."
Steven Powell is currently in jail in Washington state, having been arrested in September
on child-pornography charges.
Josh Powell had been a person of interest himself in the Dec. 6, 2009, disappearance of his wife. He told investigators that he last saw Susan at their then-home in West Valley City when he took their sons for an overnight camping trip.
While Josh is now dead, the investigation goes on. "We sure can't prosecute Josh," Nielsen says, "but did somebody know something? Did somebody help him? Those are the questions we need to resolve."