Well... It's not as bad as it first seems.
Criminally negligent homocide is a state jail felony in Texas. That is, the least level of felony possible. Normally under Texas law, one can only be sentance up to two years for a state jail felony, but due to the velocity of the car and recklessness of his driveing, it was determined that his vehicle constituted a deadly weapon, which in turn bumped the crime up to the equivelent of a third degree felony which allows for up to ten years. Given two years of time served, and a 7 1/2 year sentence... that's 9 1/2 years out of ten possible.
"I KICKED BURNING TERRORIST SO HARD IN BALLS THAT I TORE A TENDON" - Alex McIlveen