I told her, I was having difficulty with people who called themselves my daughters friends, but who wouldn't tell me she was on drugs. That perhaps, at the very least I coulda stepped in and taken my grandson many years ago, and protected him from all he was exposed to.
First - good for you! This needed to be said, I think.
Second - it is still second hand information, and from the friend's POV and memory. You don't know what happened, how often, or when. And above all, it is in the past and cannot be changed... ((hugs))
You've been through a lot, NSW, and have enough right in the "here and now" to keep you busy. No regrets from the past, 'kay?
(((NSW)))