Charleston Bar Shooting Lawsuit

A personal injury lawsuit has been filed against a bar in Charleston by a man who was shot in stomach in 2008. Plaintiff’s lawsuit claims that the bar was negligent in allowing entry to the guy with the gun. The gist of the argument appears to be the employees saw the gone but did nothing about it
I really hate these types of cases. The bar’s duty to make take affirmative action really should always depend on the context. Does he have license to carry a gun? Was he acting in such a way as to lead a reasonable person to believe he was a danger to himself or other?