Yo i'm really sorry to hear that bro.. I couldnt even imagine losing my father.. my condolences to you are your friend. and may his fathers soul rest in peace. and honestly he is in a better place.
I send my condolences to you and your friend.
I'm sure he was an awesome guy.
Tell your friend to be strong and realize that's what his dad would have wanted him to do.
That's terrible. The best thing you can do right now is be there for your friend. Try your best to see him as often as possible. Kids who have that happen, and then aren't comforted or helped often end up with a phycological issue.