Its strange to me that the killer didn't track bloody shoe prints all over, especially coming from X's room, if not a lot at least a few, heck even a fading trail as the blood wore off as the killer walked away. IMO
I find this single shoe print confusing as well, how can there be one lone shoe print with latent blood? Not even one or two before it? I know the same ol' same ol' explanation that the PCA didn't list everything, only what was needed, but I think that if there were other bloody, visible shoe prints they would have been listed on the PSA before a single barely visible latent one that was originally overlooked would have been. MOO
The only reason that particular shoe print was included in the PCA would be to try and confirm he could have been close enough for the roommate to have seen him.
I’m sure there are other much more visible footprints in the house but likely not near her door or there could be others near her door that LE doesn’t want to disclose yet.