I've referred a few times to the legal battle between Chevron and Ecuador, which has been going on for a long time in many courts. The stakes are high ($9 billion), but the real fascination has been the maneuvering (some of which seems to have been fraudulent in nature).
I've been meaning to write a summary of it, but I've been scared off by its complexity. In lieu of that, here's a video summary.
Just bear in mind that this is Chevron's side of the story, so don't take it as gospel.