Monticello, Utah (AP) A cowboy discovered pipe bombs and human remains that could belong to a man suspected of killing a Colorado police officer in 1998.
DNA tests will determine if the bones found in southeastern Utah are those of Jason McVean.
McVean and two other men were accused in the killing a Cortez, Colorado, police officer who had pulled the trio over in a stolen water truck.
McVean, Alan Pilon and Robert Mason fled over the border into Utah where they were the subjects of an intense manhunt.
Investigators believe Mason killed himself. Pilon's remains were found by hunters in 1999. An autopsy revealed a gunshot wound to the head.
The new remains were found Tuesday after a cowboy riding in the cross canyon area discovered a bulletproof vest and a camouflage backpack.
The San Juan County Sheriff's office says deputies and FBI agents also found an AK-47 rifle, about 500 rounds of ammunition, five pipe bombs and survival equipment.