A Minnesota prosecutor is renewing his push to increase the penalty for negligent driving resulting in death. A woman was acquitted this week of criminal vehicular homicide in a crash that killed three people in Inver Grove Heights. Dakota County Attorney Jim Backstrom says when you cannot prove gross negligence the only charge a suspect can be convicted of is misdemeanor careless driving. Backstrom says careless driving carries the same penalty as driving off the road and striking a mailbox. He plans to ask the 2012 Minnesota Legislature to consider changing the law again.