"His message is what is important, he was a strong advocate for transparency in the government dealings with oil companies, and a strong advocate for renewable energy research. If the government or others, had decided to kill this man, (and I'm not suggesting this is what happened), they would have made a big mistake. While he was alive they could discredit him, now he is dead, and his death is thought to be suspicious by some, his words and deeds will be widely known.
Who benefits from this man's death?"
One reason I posted this article is that I think his message is worth taking a close look at (assuming that damage control hasn't already been done, and links/articles/videos on him haven't been removed/edited.