I'm truly sorry, my condolances.
Great tragedies like these happens to people all over the world.
No matter if you are white, yellow, black, red, juiced, all-natural, +300 lbs, old, young, rich, poor, man or woman.
You just can't predict or interfere with the course of faith or whatever label one should use.
Don't blame yourself, because there is nothing you could have done different that would have undo what has happened.