Where would i stand legally?

[Landau Stable]

Sorry if this is in the wrond section. Mods, pleae move it if there is a better category.

So the story goes like this:
In 2003, i was given a van by someone i am no longer freinds with. It was bought as a job lot with 2 other cars, and i took the van immediately. There was no bill of sale given to me. The other 2 cars stayed in his possession and have since been sold. I have a photo of the van lined up with the rest of my cars, and in my possession. The photo is dated within 2 weeks of me getting it. I have since heard from others who know him, that he is making noise about wanting the van back. I have stored the van at my cost ever since, and i have never had a phone call or written request etc, to return the van. It's now 2010, and i wish to restore the van and sell it. I went to the cop shop and told the lady the story, and she said there is no way he can claim it as stolen, since he knows that i have the van, and has left it for 7 years. She said the most he could do is try to take me to court as a civil matter, and even then, he would not stand a chance due to the length of time. So my question is, How do i register it without a bill of sale, and is there any way at all he could legally take it off me after i restore it? I know that morally he has no right, but that doesn't always translate to legal rights. If you have any experience or advice, please let me know.