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A search team recovered remains believed to be those of Travis Decker in a forest about 120 miles east of Seattle, the authorities said.

By Neil Vigdor

Investigators in Washington State said Thursday that they had found what are believed to be the remains of Travis Decker, who they say killed his three young daughters in June and left their bodies near a campground.

The killings spawned an intense manhunt for Mr. Decker, 33, a former member of the military whom the police said had suffocated his three daughters — Olivia Decker, 5; Evelyn, 8; and Paityn, 9 — during a planned visit from which they never returned.