That's quite a misunderstanding, if it's a misunderstanding.

If what the OP alleges is true, 5J's explanation is one-sided at best.

If 5J's explanation is true, then he's a decent, misunderstood person who likely feels bad for possibly causing the family to abruptly sell U.S. property and return to Mexico with a terrible memory of an American, Moriarty, America, etc. It's conceivable that such a decent person, guided by a moral or civic obligation, would try to reach out to the boy and his family to set things right.

Either way, this story would make more sense if we could somehow hear from both sides.