A skull found along a trail in Sinks Canyon in Wyoming may belong to a hiker who went missing in 2007.
Authorities believe Clay Rubano, 46, fell to his death while hiking alone five years ago, according to the County 10 news site.
The AP reports that the fall and hypothermia may have contributed to Rubano's death.
The skull, which was discovered in August, was found near the location where bone fragments and clothing determined to be Rubano's were located seven months after the hiker disappeared.
A newly released report by an expert in bone identification at the University of Wyoming suggests the skull belonged to a man between 40 and 55 years old and quite possibly could be Rubano's, according to the Fremont County Ranger.
The skull will now be sent to a lab for DNA testing to try to match it with the bone fragments.
CORRECTION: A previous version of this story misidentified where the skull was found.