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.

Law enforcement believes they are closing in on murder suspect Travis Decker, the father accused of kidnapping and killing his three young daughters.

Exactly what prompted the search to narrow was not made public. The Wenatchee man is accused of killing his three daughters, then vanishing.

The murder of three young girls in Chelan County last week is shining a spotlight on veterans’ mental health issues.

The search for Travis Decker, a former U.S. Army soldier accused of killing his three young daughters in Washington state, is in its second week as the Washington National Guard has been deployed to aid law enforcement officers continuing to comb the Cascade Mountains and the Pacific Crest Trail region.

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.

Authorities say blood discovered at a campsite where three young Washington state sisters were found dead last week belonged to a male.

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.