once you get it possetion is 9/ 10ths of the law anyway, if you go to the police they note it as "dumped", they try to locate the owner and if they cant in the usual 2 weeks they will come back to you and say its yours, i did it a few times over the years with dumped cars and never had an issue mind you was like 10 years ago when scrappys charged to take cars away then