I found an iPhone 5c with a passcode?

I try to hard reset it and it goes to the connect to iTunes screen and when I do my computer beeps because a device is connected but it won't show up on the computer or itunes when in that mode. If I plug it in on passcode screen it says unable because device is locked with a pass code. IIm what to do.

You are supposed to be a good citizen and drop it into your local police station.