MM - the legal term is vehicular homicide. Murder requires intent, homicide may be accidental. Leaving the scene of an accident was the lesser charge, but I don't think he was ever prosecuted for either.
On July 25, seven days after the incident, Kennedy entered a plea of guilty to a charge of leaving the scene of an accident after causing injury. Kennedy's attorneys suggested that any jail sentence should be suspended, and the prosecutors agreed to this, citing Kennedy's age, character and prior reputation. Judge James Boyle sentenced Kennedy to two months' incarceration, the statutory minimum for the offense, which he suspended. In announcing the sentence, Boyle referred to Kennedy's "unblemished record" and said that he "has already been, and will continue to be punished far beyond anything this court can impose".