Kittitas County deputies are asking residents and visitors to be on alert as the difficult search operation for Travis Decker plays out heading into next week.

Decker, who is charged with killing his three young daughters, had lived off the grid "for approximately 2.5 months on one occasion," according to an affidavit.

Travis Decker remained missing despite a multi-jurisdictional manhunt in effect for the 32-year old father and U.S. Army veteran.