The FBI conducted a two-day search through dense and rugged terrain in Washington state in the hopes of finding clues to the whereabouts of Travis Decker nearly three months after he allegedly killed his three young daughters.

Investigators still have no evidence about whether Decker is alive or dead, Chelan County Sheriff Mike Morrison and Peter Orth, the FBI's supervisory senior resident agent in Yakima, said during a news conference Monday.

"You can't be too thorough in a search like this," Orth said. "It is such incredibly dense vegetation that anybody who walks down one of these trails could walk 10 meters off the trail and no one would ever know they're there."

Decker, a former and trained military survivalist, has been wanted since June 2, when the bodies of his three daughte

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