Drinking and driving is terrible, ruins lives everytime.
Preston and Cory both lived the wild life, both took that risk that night.
Both made a mistake and and now they're paying.
One instantly, one in the long run.
More than once person had a chance to say/do something to stop them from getting in A car, that's the downside of partying.
Cory will be doing some time, no way around that.
And when he gets out the amazing life he built will be gone.