A little bit of follow-up. My conscience got the better of me so I sent an email to an officer that I have met a few times. Not that we're friends. I explained the situation and asked him how a situation like this is handled. He replied that I should call 911 and report what I found, otherwise I risk being arrested! Not wanting the amp simply taken away, I replied that to 99.9% of the world, this would look like some common discarded piece of electronics. Since I'm smart enough to know that it's not common, I intend to keep it unless it has actually been reported stolen. Then I would gladly turn it over. His next reply asked me if I had found it on XXX street. I replied that it was the alley parallel to that street. I haven't heard back from him. We'll see. I've done nothing wrong. I just know that if it was mine, I'd want it back. And if someone threw it out, I'll take it.