"There have been no human remains found," said Inyo County Sheriff Bill Lutze. "We're finishing up this site and that'll be it."
"The story here is not what was found or what was not found but how we looked," said forensic consultant Charles Illsley. "This has been one of the most exhaustive applications for a number of combined technologies."
"I haven't been this frustrated in a very long time," said Arpad Vass, a senior researcher at the Oak Ridge National Laboratory.
Juliana Barbassa for the AP.