Unless I know for sure what is going on, I mind my own business! If, the seller offered me the bike, and I felt to to be worth my while, I would buy it, take it to the Cop Shop, and, hopefully, gain ownership three months later. Everything is legal and I did not stick my nose in where it does not necessarily belong.

Now, put yourself on the other side of the coin. You are the well dressed guy, or gal, talking to the homeless person. If someone came up to me, while I was talking to the homeless fellow, you could call the cops all you wanted. And then you could FO, as far as I am concerned, and I would help you find your way, if you pushed me hard enough.