Personally I'd rather they don't. I understand there are plenty who are all for letting him play and all that inspite of his poor decision making but I'm not one of those people.
I don't mind saying that I believe that he should never play another down in the NFL again, not just with the Cowboys.
The league should take a very hard stand against drinking and driving. They should send the message that if you do things like this you no longer will be playing NFL football.