Zimmerman's report to the police the next day.
Watch George Zimmerman re-enact Martin shooting - Video on msnbc.com
It's one side, obviously, and it seems like a lot of it should be verifiable (or disproved) by the physical evidence at the scene. He makes a lot of references to things that others should be able to either affirm or deny.
To me, parts of it sound reasonable. Parts of it not so much.