PORTLAND, Ore. (KOIN) Authorities are investigating a reported sighting of Travis Decker in Idaho more than a month since his three daughters were found dead at a campground outside Leavenworth, Washington.

According to KIRO 7, the U.S. Marshal’s Service Greater Idaho Fugitive Task Force is asking anyone in the area of the Sawtooth National Forest, specifically near the Bear Creek area, for tips.

Decker has been wanted since June 2, when his truck and the bodies of his three daughters were found three days after he was supposed to return his daughters to their mother’s home in Wenatchee, Wash.

In late June, the Kittitas County Sheriff’s Office said there isn’t any certain evidence that Decker is even alive or in the area.

Despite various reported sightings, including a possible run-in with Decker in The Enchantments, no concrete signs of him have been found.

An autopsy confirmed that the girl’s cause of death was suffocation.

affiliate KOIN reached out to the U.S. Marshal’s Service for more information but did not immediately receive a reply.