I went back in and watered the Christmas tree. So maybe 7 minuted or so passed. When i got upstairs I looked out the window. The truck had been joined by two cars with their headlights on and I could see somebody walking around the vehicle with a flashlight.
About 12:30 the ambulance and it's attendant firetruck that lives around the corner pulled up.
There was more milling about, but I couldn't see much due to darkness, snow and my angle.
About 12:40 one of the cop cars left. About 12:50 the ambulance and firetruck left, and a big honking flatbed tow truck arrived. About 10 minutes ago the tow truck and second cop car left.
The vehicle on the truck was an SUV or minivan.
Tomorrow, I have to check the Des Plaines police blotter. I'm just curious.