This is sad news. I heard Micah speak in York last year, and he was cool, compelling and entirely unassuming. He had a genuine concern that the Raramuri retained their tradition of long distance running, as the Raramuri struck a chord with him when he first met them. He feared the attention drawn to the Raramuri by the publicity generated by the Copper Canyon ultra marathon may not all be to their good. He was a really nice bloke and had a cracking sense of humour, too. Rest in peace.