How could it have happened? Carbon monoxide poisoning kill 3 and badly injures two. Not in thside but nearby?
Faster Horses Festival in Michigan had attendees who stayed in travel trailers. 5 men were inside one. 3 died and two were hospitalized. Allegedly the generator was nearby not inside the trailer.
Carbon monoxide can build up in a room by the incomplete combustion of fuels - wood, coal, propane and natural gas. Maybe there was a cook stove in the trailer that wasn't working properally. There should of been a carbon monoxide alarm in each trailer so maybe neglect is to blame. Cheers!
From what I read Nanoose the generator was OUTSIDE of the trailer but nearby. Now it didn't say what was going on inside the trailer so maybe what you mentioned was the why. But that really scared me. Now you not only have to monitor what's INSIDE but also all around you on the OUtside too? It seems there's a lot of stuff out there PRIMED to getcha! Thank you for your reply! :)