WENATCHEE, WA (MyBellinghamNow.com) – The search for Travis Decker has expanded into Idaho.

The Seattle Times reports that the U.S. Marshals Service received a tip from a family who thought they may have seen him in the Sawtooth National Forest in Idaho.

Decker has been charged with first-degree murder and kidnapping in the deaths of his three young daughters.

On June 2, the 5, 8 and 9-year-old girls were found dead of asphyxiation near Decker’s truck at a campground outside of Leavenworth.

The search for Decker has been centered on the Enchantments in Washington after hikers thought they may have seen him there last month.

Teams are also searching bodies of water from the campsite to the Columbia River in Wenatchee.

Authorities also say he may have left the area or may not still be alive.