Very sorry for your loss.
Robert
Hello. There are so many possibilities to what happened, it is almost impossible to guess. It could have been poisoning, but in such a short time, it must have been something extremely poisonous if that's what it was. I am more inclined to think it was a heart attack or even a hemorrhage of the brain. I am so sorry for your loss. This must be devastating for you. I don't believe it was anything you did or even anything your friend did. I think it is just one of those sad things that sometimes happens.
You are in my thoughts today.
Best wishes, Tony x