I wonder if this had anything to do with this, from
2016:
Police dig up university site hunting for missing college student Kristin Smart | Daily Mail Online
“Police and FBI agents have started excavated a site on the edge of California Polytechnic State University in the hope of finding the remains of a student who vanished more than 20 years ago.”
Snip
“Obviously, we want to be as optimistic as possible and we hope that this leads us to either Kristin or evidence of Kirstin.'
The site, in hilly terrain next to a campus parking lot, was one of several identified in January by dogs specially trained in detecting the scent of old human remains.”
Snip
“The location was disclosed because of its high visibility but the other sites are being kept secret because 'we do not want to tip our hat to the possible suspect or suspects out there,' Parkinson said.
He added: 'We have developed this lead over the past couple of years and have been working on it. This lead was determined, or developed, after a comprehensive review of the entire case.'”
Snip
“Around 25 FBI agents and more than two dozen sheriff's deputies were expected to take part in the excavation, using more sophisticated technology than was available 20 years ago.”