A lot of drunk driving apologists already, bummer. Please imagine being pulled over and telling the cop, "I'm not drunk, I've only had five beers!" It sounds like bullshit because it is.
I am not saying that Cory is an evil villain, I feel bad for him too, but it is ridiculous to claim he should shoulder no blame. He drank a significant amount, he drove, and now his friend is dead. He needs to deal with that, and it needs to be acknowledged, out of respect for his friend if nothing else. Beyond that, when you say the fact his blood was .10% alcohol is irrelevant it suggests driving under that condition is fine. It isn't. It sucks what happened, for Cory, but way more for Preston and his family. Please don't detract from the severity of what happened by pretending it was just a random accident.