Animalblawg has an excellent run-down of the legal implications of the case. They also have information about Virginia state law (and I understand there may be indictments by the State of Virginia in this case as well.
It makes for an interesting read. It's not just dog fighting. It's about a criminal conspiracy.
Pet-abuse.com is also an excellent resource on this. They follow court cases, and do a great job documenting cases like this (and all those cases that don't involve sports celebrites).