But now he's charged in connection with a Seattle federal gun raid. Two other Seattle men were also arrested.

FBI and The Federal Joint Terrorism Task Force searched two boarding houses in Seattle's Roosevelt neighborhood Tuesday morning, surprising tenants who live there, but are not connected to the charges.

"I heard police yelling in the house, next thing we know we've got SWAT with guns in our faces," said Ellen.

She was too afraid to give her full name, but says 65-yaer-old Keith Gilbert, a former leader in the Aryan Nations, is her landlord.

"All we ever heard from Keith is if you have problems, let us know. We have people who can take care of these things. (I) just thought it was an old man talking," says Ellen.

"My dad is not a terrorist," says Joshua Gilbert, Keith Gilbert's son. "We have property, we rent rooms to people, that's it."

But the FBI and terrorism task force says there's much more. They pulled countless assault rifles, semi automatic firearms and ammunition from Gilbert's basement. From his house alone, they confiscated more than 180 boxes of evidence.

KOMO 4 News crews counted nearly 100 rifles and hand guns. FBI agents arrested Keith Gilbert and federal prosecutors charged him with possession of two machine guns, two AK-47's and possession of an unregistered rifle.

"I'm not aware of any machine guns in the house, I don't own any, I don't know of him having any. If they found any, it would be a real surprise to me," says Joshua Gilbert.

Some neighbors said they weren't surprised. They said they've heard rumors, but never any proof.

"No, it's not real shocking to me, I know enough about the guy that it doesn't surprise me," says Mike Benneck, who works at a nearby fruit stand.

So far, only three suspects are in custody. But there could be more. While Gilbert faces gun-related charges, his neighbor William Heinrich, who rents a room in a boarding home across from Roosevelt High School, is also facing gun charges.

"We thought it was a little hinky that he had five locks on his door, ya know, didn't want anybody in his room ever," Ellen said of William Heinrich. FBI agents also found weapons in his room.

He and Gilbert are friends, but federal agents think they're business partners in an illegal gun ring.

"I never heard him dealing in guns or selling guns or doing anything like that at all," says Blake Sisley, a neighbor and business owner.

A third suspect, Preston Hejna, also of Seattle is charged with conspiracy to transfer five pounds of C4 plastic explosive that prosecutors said had no detection agent.

Federal prosecutors say the suspects' motive was money, and do not believe the illegal firearms have any white supremacy connection.

If convicted, Gilbert is facing 50 years in prison. He and Heinrich are felons and not allowed to own firearms.

Wednesday, the FBI arrested a fourth suspect and is still looking for a fifth.