I said this very thing myself, right from the get-go.  They needed to keep quiet and not give away the cart AND the horse at the time, but these guys blabbed so much it's just a pathetic mess now.

https://www.westernjournal.com/stunning-mistakes-complicate-idaho-college-murder-investigation/

I doubt they'll ever get this solved now.  The killer is probably hiding up in a tree for all they know.