He handled last year's situation the way anyone should handle it; by listening to his lawyer. And if he came forward after a week and said he was driving but didn't know he hit her and still received a traffic ticket, what do you think everyone would have been saying? What a gosh-darned goody good guy he was? Or that he "got off" with a plea bargain before any real evidence came to light? At least the way it happened, the DA had a month to investigate, and still couldn't find anything to show that Lynch was drunk and/or knew he hit her. If anything, blame the DA for allowing things to drag out so long.
As for sending a clear message, yeah, he sure sent one to Marshall last year. And he was just arrested for disorderly conduct, but charges were dropped. How long of a suspension should Goodell give him, now that Marshall "has a file?"