Police find no indication of foul play . The man had told police he was feeling sick , police say . Note : Preliminary autopsy indicates they may have died of carbon dioxide poisoning . About 500 people a year die of carbon monoxide poisoning in the U.S .
Police find no indication of foul play . The man had told family he was feeling sick , police say . Police : Preliminary autopsy indicates they may have died of carbon monoxide inhalation . About 500 people a year die of carbon monoxide poisoning in the U.S .