Well, yes. That's precisely it. I seriously doubt that the case is so simple as it's being represented. One thing I've learned from FR is to distrust any story like this one. There's always a lot more to it.
I followed someone else's link and got to this:
http://www.ncfm.org/will.htm
I'm unfamiliar with the National Coalition of Free Men, but they give quite a bit of information here. I've had experience with websites that are very convincing about someone's innocence and left out details that got people convicted, but the thing that I keep coming back to is that he had to represent himself at trial (which this website says).
If he did in fact represent himself at trial, it explains a lot about how he could have been so abused by the system.
It would be interesting to see the state's case against him.