This story creates so many thinking processes:
They were in 4 cars. Where in the procession, was the car that had human remains under it?
If they were 1st, 2nd and third - did they see it?
Did any of them hit it?
Did the police check under the other three cars for other evidence?
Did the other four drivers see a dog carcass?
did they see anything?
When the driver saw the dog carcass, did he drive over it?
Why didn't he drive around it?
How fast were they all going?
Did anyone feel of hear anything as the driver went over the carcass, human or