OK, I've been trying to ignore this thread because I am a paralegal and I sue people every day for similar things and I get tired of defending myself for it, BUT - here goes:
I am not familiar with Missouri law but in Indiana (and I assume it is very much the same in Missouri) the law holds that the establishment is responsible for the negligent act of an intoxicated person if they serve alcohol to that intoxicated person. Why? Because when you are intoxicated, your judgement is impaired (hence driving drunk, not wearing a seatbelt and talking on the cell while driving). By serving alcohol, the establishment agrees that they are aware of this and they agree to substitute their judgement for your own and to "cut you off" if they feel you are intoxicated. Yes, many people can drink 10 drinks, be WAY over the legal limit and not appear intoxicated, however, a bartender should know that, just because someone can hold their liquor, if they drink several drinks, they are intoxicated, regardless of appearance.
The law also holds that a motor vehicle that is driven on public roads must be in good working order AND that if a vehicle should become disabled, it is the duty of the driver to keep the vehicle from becoming a hazard to oncoming motorists, by moving it off the roadway, putting out flares, whatever is necessary.
Do I think this drunk-driving idiot is responsible for this accident? YES, however, if he were my kid, I'd be pretty **** pissed at the bar that served him drink after drink and then let him drive away. I know they offered him a cab (which only proves that they DID know he was intoxicated) but HIS JUDGEMENT WAS IMPAIRED AND HE SAID NO. At that point, they should have called the police and reported that an intoxicated person was getting into a car and getting ready to drive. He would have been arrested, no accident, no death and no lawsuit.