Five years probation. Let's see: That's one year probation for each two people killed. The maimed and injured need to be contented with his "hollow apologies" (per the judge) which he did not even offer personally to them, just as required in court.
Meanwhile, you have got people in prison for possessing one joint or just being in the wrong place at the wrong time...
I think Digger has the answer in post #74.