Authorities have closed a wide swath of popular campgrounds and backpacking areas along the Pacific Crest Trail in Washington as they search for a former Army soldier wanted in the deaths of his three young daughters.

Washinton police have been searching for Travis Decker, 32, since he did not return his three daughters to their mother May 30.

Here's what to know about Travis Decker, suspected of killing his daughters Paityn, Evelyn and Olivia in Washington state.