What makes you think they don't? I have a good friend who was smart enough not to get into the drunk guy's car (leaving a fraternity party) and followed on his

What makes you think they don't? I have a good friend who was smart enough not to get into the drunk guy's car (leaving a fraternity party) and followed on his own. Thus, he was the first person on the scene after the accident. He wound up being a witness against the driver in a homicide trial. So at least in the State of New York, you can be tried for manslaughter when your drunk driving results in someone's death.