THE PROPER AND ETHICAL THING TO DO IF YOU FIND A 'STOLEN BIKE': From: Bikeportland.org. "Is this thing hot? What to do if you think you found a stolen bike." "If the bike has clearly been left there and the owner/rider isn’t around, please take it in and call the police non-emergency number. Sometimes the bike has been stolen and dumped, or stashed someplace in the bushes for the thief to come back and get later. Let the call-taker know that you found a bike and would like to turn it in.