The point of the quote you are using is that judgement should be left to God and not man (the statement itself is kind of judgmental but I guess that's accepted because Jesus and God are both part of the trinity in Christianity). If you subscribe to that theory of life than more power to you. I do not. I have no problem passing judgement on someone who killed an innocent young woman and honestly my experience is that most Christians will pass judgement on a person for far less.

Do you not see any possible explanation for why a public figure such as Ted Kennedy would have wanted to walk away from the scene of that accident? Isn't it the most human response, to walk away ashamed of what you have done? Don't you think he regretted it, probably for the rest of his life? And now I would ask you, have you ever done anything you didn't intend to that you were ashamed of?

Most of those questions could probably be applied to anyone who was committed a crime.