You done good GB. I understand your desire to want to know more, but feel awkward about it at the same time. Try talking to the LEO's. They might be able to share some details of what happened that wouldn't compromise the kids privacy. It can help you have some peace, too.
FWIW. That's the same car I drive, GB. They weren't hot dogging. The Land Rover Discovery is all about off road/marginal condition handling and ability. Full time 4 wheel drive, but pretty gutless. They cruise fine when up to speed, but take a while to get there. They are high center of gravity, however. If something spooked them or there was an oncoming vehicle and they swerved too hard, they'll flip pretty easy. steering is very tight and responsive. An over correction can be bad. They're a lot like driving a jeep. And some models have two jump seats in the rear cargo area so there is seating for up to 7