Investigators have been looking for Travis Decker since May 30. Three days later, a sheriff's deputy discovered the bodies of his three young daughters.

Paityn Decker, 9; Evelyn Decker, 8; and Olivia Decker, 5, were located on June 2 near the Rock Island Campground in Chelan County, Washington, police said.

Travis Decker remains at large more than a week after the bodies of his three daughters were discovered at a remote Washington campsite, authorities say

Thousands of agents, officers and specialists will be deployed from local, state and federal law enforcement agencies from across the country for security.

Authorities believe they spotted the father suspected of the death of his three daughters. Tuesday night, investigators say they believe Travis Decker was seen in the Washington state backcountry. The

Authorities say they believe they spotted Travis Decker, an ex-soldier wanted in the deaths of his three daughters, in the remote backcountry of Washington state, after receiving a tip from hikers who said they saw a lone person who appeared to be ill-prepared for the conditions.

Officials said anyone residing in the area or staying in cabins should lock their doors and cars and check footage from cameras.