West Valley City Police Department Deputy Chief Mike Powell:
"Today Susan is still missing. We do not know where she is or what happened to her," said West Valley City Police Department Deputy Chief Mike Powell. "Searches have been exhausted and no additional information is available for us to investigate at this time. ... Over 800 tips and leads were followed up on and cleared."
West Valley City police said they are also releasing the case file, with details that have been kept under wraps since Powell vanished in 2009. Police held a news conference Monday afternoon.
Police spent two days unsuccessfully searching in rural Oregon last week for any trace of Powell. West Valley City Manager Wayne Pyle told The Associated Press that police were at the end of the investigation, without any active leads, and might close the case.
Police have said they would reopen the case if they get new information.
Susan Powell was reported missing in December 2009 after she didn't show up for work. Her husband, Josh, maintained his innocence and said he took the couple's young boys on a midnight camping trip in freezing temperatures the night his wife disappeared.
In February 2012, Josh Powell locked a social worker out of his home at the start of a supervised visit, then killed himself and the couple's two young children, attacking his sons with a hatchet and then setting the house ablaze. Days earlier, a court had ordered Powell to undergo an intensive psychosexual evaluation as part of a custody dispute.
Josh Powell was never charged in his wife's disappearance, but unsealed documents say authorities found Susan Powell's blood on a floor next to a sofa that appeared to have been recently cleaned, with two fans set up to blow on it. Investigators also found life insurance policies on Susan Powell and determined that Josh Powell had filed paperwork to withdraw her retirement account money about 10 days after her disappearance.