We have people who are carefully monitoring as he strips soil away and looking for any change in the soil color, potential indicator of artifacts or other objects," Oklahoma's state archaeologist Kary Stackelbeck told
CNN affiliate KTUL.
The area is being treated as a crime scene, with a forensic archaeologist on site looking for clues.
"Gunshot wounds, signs of burning, all of those are issues that can survive with preservation if the preservation is good enough there," Phoebe Stubblefield, Forensic Anthropologist at the University of Florida, told KTUL.