"A little. Not as much as I'd like."
She has elevation maps for the area - including historic ones, and ones close to the start of the disappearances, with differences and signs of construction noted. She's figured out what could have been built under there - a range of stuff, with uncertainties noted. She's been sniffing around things like private security companies, trying to figure out if any of those are providing guards - she thinks there's a decent chance some of the guards will be professional, but that most might not be top notch. She doesn't have much concrete, though, not yet.
Additionally: she has a kinda incredible and possibly illegally obtained set of financial records of various companies and such who she think have interacted with the culprits ever. She has a rough estimate for the budget the program is operating under per facility, and has used that to create a list of known entities that could have the right resources, as well as vague sketched profiles of what an unknown entity might look like here. She has a few profiles of known pokemon smugglers, including notes on if they might be working with the culprits. She has a lot of notes on individual disappearances. This last stuff is all mostly guess-work or unprocessed evidence, but Espeon doesn't think she'll need a ton more to use it to narrow down actual culprits.