Update on the source of the CO that caused the deaths of 7 members of a Minnesota family in their home last month:
“The two possible sources of carbon monoxide in the home were a van in the garage and the unit’s furnace. Further blood tests did not show the presence of blood cyanide, which would have indicated the vehicle was the source.”
If you own a rental, please ensure your tenants understand the lifesaving importance of maintaining CO alarms, especially if permanently installed CO hazards are onsite.

Police: Furnace was source of carbon monoxide deaths in Moorhead – StarTribune.com