Another thought I had about potential knockoffs of well-known brands -- sometimes fraudulent sellers will post stock photos of the product they're trying to knock off, and then when you receive the product, it's not what's shown on the website. I've seen this happen on Ebay, and I'm sure it happens elsewhere.
I'm in the midst of doing some more tracing of the original image -- and please take this image with a large grain of salt, because I've taken a fair amount of artistic license with bits and pieces -- but I wanted to mention a few other things that've come to mind:
1) There appears to be faint lettering -- maybe "PO" at the top of the image. Interestingly, if it were "PO" it would be reversed from the way we're thinking the other letters are oriented. Maybe it's nothing. Maybe it's remnants of something that was watermarked as police evidence?
2) I can't decide what to make of the bit down below that sort of looks like an "E." Again, maybe nothing. (I've found if you zoom in and out on the image, different details will pop out; e.g. when I try to look at the tread that goes all the way down the image, I can't make it out at all when zoomed into the picture, but it's clear as day when I zoom out or look at a thumbnail!)
3) The shape of the tread makes me think that the primary block of text might be at an angle on the sole; i.e. perhaps the center line between the two logos is actually the midline from toe to heel.
4) Is it possible that the repeated logo that's barely visible down below may be from a second impression of the same shoe, rather than a repeated image on a single footprint? If so, my point 3 above could be less compelling.
5) What's the deal with the weird white outlined arrow? It almost looks like a flaw in either the concrete, or like something (e.g. a piece of tape?) stuck to the bottom of the shoe, rather than part of the sole design.
More questions than answers, I know, but just thought I'd throw them out there.