Personally, I think Iran would be stupid to just give back the downed drone because the US asks for it. We were spying on them, the drone went down, why give it back? We would not do it if another country's spy plane went down in the US.

I had heard that some signal was sent to the drone plane when it was not responding to commands that would erase or destroy all the technology aboard. The plane is still a problem with the secret skin on it, though.