There is really not enough info in this hypothetical mind game. Is the parent and the child the only people in the car? Is the child legally strapped in, in the back seat? Then how does the parent know the child has stopped breathing? So, the child has become passed out in his child seat? So, then doesn't the parent have to get out of his seat to check it out? So he's already parked but instead of getting help from 911 and from someone in this residential area, he does nothing but jump back into his car and drives like a bat out of hell?
Too many possible variables to this hypothetical situation.