a medical examiner can say alcohol is cause of death in a traffic accident?  the immediate cause of death was blunt force chest  trauma, however, there is a huge mitigating factor in that the blood alcohol level was such that it is determined to imped a driver's a ability to drive. not a huge leap of logic to conclude he was impeded by alcohol, which caused a poorer performance, and he did drive into on-coming traffic. I don't see how she can have a case.  the guy was drunk, swerved into the on-coming lane and hit another rig head on.  maybe it was exact timing of a rogue tire but the police or other people in the crash didn't mention it.  I feel for the widow on lots of levels.  she suffered a huge loss