They won't. Best they will do is let you turn it in there and wait to see if the owner comes looking for itNo, you can't. Take it to an Apple Store near you and let Apple identify the owner.
In California it is. Found objects where you don't make an effort to return them are considered theft. Brian Hogan and Gizmodo taught us that lesson
Anyone ever notice how these threads always seem to end the same way?
Past the second or third response of "Thief," "Do the right thing," and so on the OP disappears and all the following comments are only by others with similar responses.
I always find this interesting because it tells you exactly what the original intent was. If the OP is legit they'll come back and defend themselves, but it rarely seems to happen that way.
Just a personal observation.