In California all DUI convicts are made to sign “The Watson Admonishment”, which forces them to acknowledge the danger of DUI. If you are the cause of fatal DUI after signing this you are charged with murder rather than manslaughter.
California Code, Vehicle Code – VEH § 23593 « Prev Next » (a) The court shall advise a person convicted of a violation of Section 23103 , as specified in Section 23103.5 , or a violation of Section 23152 or 23153 , as follows: “You are hereby advised that being under the influence of alcohol […]