I'm still putting a lot of blame on Apple here. Lots of blame could have been passed to the person who found the phone if it was tagged with a sticker that said: "Property of Apple Inc, If found, please call XXX-XXX-XXXX and report number XXXXXXXX."
Our company property have similar stickers on them, but from the photos it appears this was not the case (unless it was removed)
It would be easy for Apple to have such a similar setup, even if it's just a special number for only prototypes. It would have given the person finding the phone a easy method to return it.
The finder did find out the owners identity though and knew how to contact him. And the problem with such a sticker is obviously that it'll give away proof that it is indeed an Apple prototype..which is of course why they don't have such things.
Besides, it doesn't really make any of the criminal acts in this case any better really?