I'm starting to sound like a broken record on this issue, but the problem isn't the penalty, it's the difficulty of proof. Vehicular homicide needs to be a strict liability offense just like all other traffic offenses. The minute they kill someone, drivers are absolved of their ordinary duty to be responsible for the operation of their vehicles, and instead, prosecutors must prove (depending on the state) at a minimum negligence, sometimes as much as recklessness.
IOW, it's easier - far easier - to convict someone of hitting a tree, than to convict them of running over a cyclist, or another motorist. That's BS in my book.
Speed comes from what you put behind you. - Judi Ketteler