You used to see that kind of thing happening fairly regularly here, and sometimes still today, people taking responsibility for some injury or death causing accident, then killing themselves. I recall a bus accident where the driver was going too fast and slipped at a curve. Along with the injured in the bus, they found him hanging by his necktie from a tree close by. He didn't waste much time, apparently. Something left over from the samurai age, I imagine, or chalk it up to work seriousness. It recently happened when the president of a railway threw himself into the sea after a train derailment. Pretty drastic measures....