I thanked him for his apology, extended my sympathy (but what can anyone really say to something like that) and wished him well.
Many of these difficult kids have stories that explain their problems. I know there was nothing I could have done to help him and I am glad I never said anything in class that might have embarrassed him. If this had been a high school class, his failure would have been my fault. I'm glad I am not in high school any more.
RIP Rob's brother. Rob, find the strength to go on. I bet your brother would want you to do well.