He doesn't "know too much" the_shrimp, he's a raving loony who used to be a well-respected pilot and engineer, but who couldn't cope with the fact that his friend and colleague screwed the pooch. He then spent most of his time developing ever more fanciful theories as to how the evil AI and French government collaborated on making his mate out to be the bad guy.
OutOfRunWay : They *did* change the design though, albeit too late to save Nick Warner and his crew. The Habsheim incident had nothing to do with mode confusion though, that one was down to ill-advised showing off in a low-energy situation.