There is (or at least was a few years ago), an entire department in the FBI that does shoe print analysis. I assume they’re helping or already helped LE with identification of the latent print.
In another case I followed, a key piece of evidence was identifying a bloody shoe print (Hush Puppy certain model, size 12), and connecting it to a purchase made by the defendant at DSW. Of course the shoes were missing (defendant said they were “donated to Goodwill” of course). (There was interestingly, also a decoy bloody shoe print to throw off investigators IMO, and this guy wasn’t a criminology student.)
This is an old article but describes the shoe department at the FBI. It’s amazing what they can do.
The Forensic Analysis of Footwear Impression Evidence