Please understand we are in India... its very easy to write from the comfort of your airconditioned office/home. But see the other side of the coin also. People do not love to sleep on pavements or roads, they sleep there bcoz they can't afford luxary me & u r having... The fact remains Alister was drunk and he was mature enough to know that his action of driving rash after drinks can be dangeruos for others. Many of those killed were sole bread winner for some families, think a bit about them also.
He should be punished with minimum of life sentence (this too as he may claim and court will uphold that he was unaware of his actions) if not death penalty.
