Thats just awful. And what a horrid statistic. So sorry for your dillema, hope your friend can hattle through this.
I can relate somewhat. When I was a Sophmore in high school a gal I knew died in a car wreck in March. My cousin two years my elder was close with her and I spent alo of time with him. More so than usual, to help him deal with it. That December as fate would have it, he was killed in a car accident as well. One minute your 16 getting ready for work at the local grocery store, the next your Dad is informing you that your best friend is gone. Life punches you in the gut, and then you grow up just like that. I spent the rest of the day consoling my friends who didnt understand how I was dealing with it better than them. Simple, he would have wanted me to. That was eleven years ago. This past fall I was a Paul Bearer for his Grandfather who raised him.
My wife also lost her Uncle. From an incredibly close family. Guy got into some hazardous waste at work they supervisors didnt look up before having him clean it up. He spent the next several years slipping away. He passed away during the Big Ten Championship against Wisconsin after a long tiring battle.
Point I want to make is that nobody knows when life is going to get detoured ans there is now way to prepare and theres no wrong way to react. The fact you can be strong for your friends and family is perhaps the best way of coping. Helping others through this difficult time may help you as well. I know I had my breakdowns over my cousin, but mostly I stayed strong for everyone. I hope you and everyone involved will be strong for your frie as well. Horrible thing to happen. Wishing you all some good will and luck through this.