no, beheading is the punishment for murder(with the intention of killing and not by mistake) and other crimes such as drug dealing(steroids are not categorized under drugs).
So, he would just be hanged or shot? Or no execution?
i'm wondering what would be the legal consequences if he actually ran him over?
There wouldn't be any charges filed even if the lady pulled out a gun and shot him dead. Any preceived threat to one's life is justified homicide and I believe that a guy hitting your car with a crowbar and demanding you to open the window is enough