I don’t see any reason he couldn’t at least try to contact these people.
The real question is will the admissions office listen to what he has to say.
If you’ve done something clearly unscrupulous and significant in nature and he can prove it the bar may very well be interested in what he has to say.
Well the matter I had confided in the person is something that that person later distorted and disclosed to someone. It hasn’t done major damage yet.
I got on his bad side by making some litigious hints. If I actually bring a defamation suit, will that make him and his dad more or less inclined to call the admissions office/the bar?
That is, another question is whether I can do anything to prevent harm.