Richmond is involved because it is her place of residence. The locality of her disappearance is complicated because they can't be sure of her last location. She was partying in Lex, but she left there. The Garrard Co guys say that she left them. Basically it's like Fayette and Garrard counties are saying "not our problem, she left us." All three cities are helping with the search, but Richmond is the core because it's the place where she lived. KSP has been involved. Not sure why that's not being reported more. With all 3 counties playing a role, though, IMO the KSP should be overseeing the whole investigation.
There is a ton of victim blaming in this case. It is making me mad. And, honestly, I think it's that and the drug rumors that are keeping this from being a bigger story.