If they were really "intent" on killing the troopers why didn't the dead guy just pull out his gun and shoot them right from the start? Sounded like the trooper might have been using "fighting words" and taunting the guy. Dead guy just brought the fight to the trooper that the trooper wanted. Again, why didn't the troopers just deescalate the whole thing and leave? Cause they got the whole "god" complex going on. There was no crime being committed at the time. If they'd have just left these two yahoos alone no one would be dead.
If the troopers had just left and some other good old boy stopped and tried to help and they were to reply in a rude manner we may still have had a person die, just it may have been a good Samaritan that "dissed" (such a stupid term) a person who seems to have had a mad on going, could be from the truck getting flooded, could be alcohol related I dont know.