"We're going to keep the pressure on," the Chelan County Sheriff told USA TODAY June 12 as he prepared to board a helicopter to help in the search.

The girls, Olivia, Evelyn, and Paityn, were found dead near a campground on June 2, three days after they were last seen alive.

Decker is deemed “dangerous” — and possibly armed — as he remains on the run a week after the bodies of his daughters Paityn, 9, Evelyn, 8, and Olivia, 5, were found bound and with plastic bags over their heads near an abandoned truck he’d been living out of.