I feel for you, Davros. I know all too well how someone you're close to can be taken away from you. I know I'm not the only one who occassionally visits this forum who has had this happen to them... and I know how much you've had to go through in the past year.
So I'll pray for you and your friend... God works in mysterious ways. At times it's pretty clear that only He's the only one who's ever going to be able to understand Him. The most you can do is trust Him, and be there for your friend and your family. They'll be looking outwards for strength.