NEW : Josh Powell kids had chop wounds , autopsy shows . Powell and his sons died of carbon monoxide poisoning . Powell sent goodbye e-mails to his pastor , others About two minutes later before the fire . Powell donated his sons ' toys and books to a local charity , seemingly to clean house , he said . A Puyallup police chief vows to keep on the case of Powell disappearance .
NEW : Josh Powell kids had chop wounds , autopsy shows . Powell and his sons died of carbon monoxide poisoning . Powell sent goodbye e-mails to his pastor , others About two minutes later before the fire . A Puyallup police chief vows to keep on the case of Powell disappearance .