I've used cannabis medicinally for chronic multiple issues for years. My doctors have known how I do it, what for, and they even said years ago if it were legal (then, which now for me, is) , they'd prescribe it to me just as I learned to take it. I basically microdose, as the kids call it these days. LOL! who ever knew my old midnight toker self with my old dugout would be a microdosing advance in medicine ? haha! And now, I just vape my flower, anyway.
I think in this case, you can give him a second chance, and it's a step in the right direction apologizing. Hope the young man can get back on track to being as good of a person (and basketball player) as he can be.