Personally you can feel when a horse comes off fence inproperally. She should have NOT pushed her horse to the finish and pulled up right AFTER the fence.
I think it is great that this group takes these things so serious. I know of several other associations who should follow in thier footsteps. Many horses would greatly benifit.
I'm sure there will be a thorough investigation. The USEF and FEI can absolutely not allow abuse to happen in an event of this stature. However, we should all keep a cool head about this and leave it to the authorities to decide what really happened here -- after all, nobody who has come this far in such a difficult equestrian sport, requiring true horsemanship all around -- could possibly have based their success on abuse! Eventing takes way too much team work and trust between horse and rider, and ultimately, nobody can force a horse to do something it really doesn't want to do. Before we scream abuse, we should accept that Amy Tryon is a consummate horsewoman to have come this far, and give her the benefit of the doubt.
Abuse is to strong a word to use about this tragedy. Amy would never have completed the course if she felt in any way La Samurai was injured. I think people are being extremely harsh on her. My sympathy goes out to La Samurai, Amy, and his owners. Bless them for standing by Amy side, it was a horrible accident but not her fault.