I never read the article until after your post. Don't believe the windows were down though. The muck acted as snow can, and blocked the exhaust system. From the article - Authorities say it appears the vehicle got stuck and exhaust fumes entered the enclosed passenger compartment.
I did it in snow in my highscool days. Almost got frostbite on my ass A car is a great upgrade, trust me Yes, just turn the car off, if youre doing it right it should be warm enough
http://www.centralmaine.com/2012/05/15/trio-may-tried-to-avoid-deadly-fumes_2012-05-14/ like i said, younger guy was in my class in high school and it happened in my county. i followed the story with disbelief over the official report after seeing pictures of the scene and whatnot.