Josh Anderson
If the bike isn't reported as stolen anywhere, is it really worth your time and headache (and safety) in trying to repo, and find who it belongs to?
That being said, the guy's name is Leroy. He's on the PPD list for convicted bike thieves. He's apparently the "kingpin" of the bike theft ring happening in the NW/SW area. He's got nothing to lose, which is a lot less than what any of you have to lose, so I'd suggest not pursuing him on his *maybe* stolen $300 Bianchi.
Unless you have solid tangible proof of a bike being stolen, I would suggest not messing with the people in possession of them. Moving stolen bikes and working in the black market is a full-time job for some people, and how they stay alive. I know a lot of times it's obviously a stolen bike, but is it worth risking your own neck to get it back?