If you cannot stay with him, then I believe you should tell him. Not knowing at all might be more comfortable, but if he is on his own, he will hear what he was not told sooner or later - and it would be better for him then to hear it from someone he can trust. I... had to deal with something similar recently, and though I was happier without knowing, I am glad I learned what happened from my friends and not strangers.
[Another pause.]
...Besides, if your friend never learns what he did, then he can never truly apologize or try to atone for it. It would be unfair to take that away from him.
[voice]
[A long pause as Martel ponders the issue.]
If you cannot stay with him, then I believe you should tell him. Not knowing at all might be more comfortable, but if he is on his own, he will hear what he was not told sooner or later - and it would be better for him then to hear it from someone he can trust. I... had to deal with something similar recently, and though I was happier without knowing, I am glad I learned what happened from my friends and not strangers.
[Another pause.]
...Besides, if your friend never learns what he did, then he can never truly apologize or try to atone for it. It would be unfair to take that away from him.