This case has similarities to one that happened in California in 1998. In that situation, a drunk driver hit a JW woman, she refused blood and died. The state tried to convict him of murder, but the jury assigned blame for her death equally. The drunk driver got ten years for manslaughter.
http://amarillo.com/stories/1998/12/19/usn_ddriver.shtml#.VVqL0rlViko
There is a good discussion about the case, and the legal dilemmas that it posed, on this site here: