Ethan Couch, known for killing several people while driving and being diagnosed with affluenza, was given 2 years - 180 days for each victim.
For drinking and driving while driving into a crowd, breaking probation, and fleeing from law enforcement, I'd say thats a bit tad on the low side. Just a little bit.
Example source: http://www.nbcnews.com/news/us-news/...ng-out-n555366