This is so sad, I really hate to hear news like this. The good news is that statiscally these events are so rare.
Speaking of Togo, I believe they also provided Kings Island with the King Cobra which operated for several years. I vaguely remember an incident in 1984 (the first year King Cobra opened), when a wheel fell off causing the ride to partially dislodge from it's track. Nobody was killed, but several people suffered from minor injuries. The problem was apparently corrected, and the ride reopened before the end of KC's first season. Does anyone else remember this?