Maybe both were drunk as hell and thought this was a great idea to get home...
What? They both doing in the back seat!!??
SO they were coming from a cul-de-sac in the neighborhood. They were actually likely leaving home. Here in Houston, leaving a cup-de-sac means you are leaving home. Doesn’t discount that they could be drunk leaving home however. Your point still stands.
First thing I thought also. Technically is it drunk driving? It’s still dead dead.