If you were to take one hundred teenage boys, put them on a beach at night with a suitable girl, get them thoroughly drunk and stoned, and then give them a realistic test of ability to think straight in an emergency, put the losers in jail and give medals to the winners, how many medals would you need? Any?
This test should be administered only by those who have significant experience as stonehead boozers.
If it were otherwise, we could let officers of the law, including judges, jurors and prosecutors slurp and toke to their hearts' content while they do their work. Same for airline pilots and surgeons.
Once the fog cleared out of the kid's head, he had the natural response of guilt and remorse, for which he should at least get some credit. What he needed after he sobered up was some serious emotional and legal counseling, which I doubt he will be getting over the next few years.
As for the girl's family, I don't expect them to share my views. If it had been my daughter, I'm not sure what I would think or feel, other than grief and outrage.
If the boy had been my son, I would be utterly devastated.
Those who may want to boo this post are free to do so. Death before one's time is a terrible tragedy, to which there is no useful response other than the emotional, unless you are Doctor Spock. This is why we hate war, famine, plague and natural disaster.