I agree. And I speculate they knew about Diane's problems too. Brother knew exactly what was going on, told her to stay where she was and don't drive any more. He immediately left house to look for them, like he has had to do this type of thing before. I mean, I am not certain, but their actions seem strange. If he thought it was a medical problem, he would have called ambulance or something. Instead, he doesn't want to get the authorities involved, because of the obvious legal ramifications for sister and goes out to find her. BTW, Daniel Schuler sued the Nance's because they owned the minivan that was involved in the accident. Talk about a shitty thing to do.