PORTLAND -- The husband of a missing Portland woman told KGW he failed a police lie detector test, although he is not officially been named a suspect in the case.

On Friday, detectives took a computer, paperwork and some receipts from the apartment that Heather Mallory shared with her husband Brian Cole and their three-year-old son.

Mallory was last seen arguing with Cole at the apartment on March 8th. Her parents said she has not been seen or heard from since.

Friday, Cole said detectives administered the polygraph test, asking him if he killed Mallory, and if he knew her whereabouts.

When asked why he failed the test Cole replied "I don't know."

Cole told KGW Friday that police also took his truck. He was at the apartment gathering belongings Friday because the lease runs out Saturday. Heather's parents were also removing items from the apartment.

Cole already moved out. He is now living near relatives in Sand Point, Idaho with the couple's three-year-old son, River.

Police would not elaborate on what they found at the apartment, located in the 11000 block of South East Raymond Street, but they did confirm that the search warrant was part of their ongoing investigation into Mallory's disappearance.

 Background: Mallory sought restraining order

Police found Mallory's red sedan two weeks after she went missing, but no sign of her.

Heather's mother, Jeni Mallory, spoke to KGW Thursday about the new developments. While her mother is quite distraught over her daughter's disappearance, she said she's happy to hear the news that police were out there, still working the case.

"I really feel like, you know, I'm missing a lot. This comes and goes, so I'll be fine," she said, tearing up.

Earlier this month, KGW learned the Mallory, 32, filed a restraining order against Cole in 2006 but later dismissed it.

Neighbors said detectives walked out of the apartment, Wednesday night with several bags of items and some items wrapped in paper.

"I try to treat Brian neutral and not think about it. Is he a suspect? I think it's only natural that husbands are suspects and is he the only one? I don't know. I know police have not shared that with us, so we just just don't know," Jeni added.

She said it would be very unlike her daughter to just run off and stop doing what she loved, which was taking care of River and futhering her culinanry career.

Both Mallory's parents and Cole have made public pleas for help finding Heather. There is also a $6,000 reward for anyone with information on this case.