How did Zappos founder die?

The former founder of Zappos, Tony Hsieh, may have intentionally set a fire off in his home. Either it was a careless act or he was trying to cause harm to himself. However, I do not want to believe this. Dying in a fire seems to be a bad, bad way to go. Personally,, I want to believe it was just an accident. What do you think happened?

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