GUTHRIE COUNTY, Iowa- Federal investigators say four people who died in a Guthrie County plane crash November 9th, died of carbon monoxide poisoning. The report finds elevated levels of CO in the blood levels of all of those on the aircraft.
The National Transportation Safety Board reports there was a two-inch crack in the muffler, which allowed gas into the cockpit.
Those killed include 49-year-old Edward Anderson, 36-year-old Pat Kellen and 15-year-old Samantha Clark, all of Le Mars, and 28-year-old Tyler Douvia of Merrill.
They were on their way from Le Mars to Osceola for a hunting trip.