Legality of publishing letters written by someone else

You’re pretty much describing the circumstances of the Salinger case mentioned in Post #2 (bolding mine):

Salinger won the case, by the way, in no small part because Hamilton’s “paraphrasing” was deemed too close to the original phrasing of the letters.

This is really another question entirely, so maybe I should start another thread, but:

If a person can’t profit from his crime, can someone else? If I’m best buds with a guy who committed some horrible crimes, and any money he would make would be destined for the estates of his victims, can he just tell me the juicy bits, and I can publish it and make money?

That seems like a fairly major loophole.

Already done.

Son of Sam laws were ruled unconstitutional. A person can write about one’s own crimes and profit.

That’s what ArtS did (above). I wish it were me that he trusted because I wouldn’t give it back!