Yes, I realize that DA's think everyone is guilty. They are also under political pressure to get as many serious convictions as they can. I highly doubt that Clark wanted to agree to a traffic violation, but given the lack of evidence, he really had no choice. And since he didn't offer it in the beginning, he probably thought there was more, only to find out there wasn't. Again if there were evidence that Lynch was drunk or even drinking heavily, there probably wouldn't have been a plea deal, and we would have heard about it.