This doesn't depend on the age of consent. You could do that to your aged grandmother ~ just take her out and leave her at a gas station or a restaurant in a distant city and drive off.
People do this all the time and when they get caught they pay a stiff penalty.
Perhaps, under certain circumstances, this may be true- I'm not a lawyer. But this case looks like a friend or acquaintance gave the girls a ride to the party but didn't want to leave when they did. This happens all the time. Everyone has certain friends they'll never go to a party with- either because they always want to leave early or they stay until the host kicks them out. Again, my argument- the father should have calmed down and planned a strategy when he went to get his daughters. I mean, he had 35 miles to think about what his plan of action would be.