The AG's father, Donald Barr, also [may have] hired Epstein as a math and science teacher at the Dalton School where Donald Barr was Prinicpal, despite Epstein seemingly lacking appropriate credentials [1]. William Barr was either a student there or attended in some capacity. Note the linked article at the bottom shows it is not clear whether Donald Barr had a personal role in the hiring of Epstein.

[1] https://www.huffpost.com/entry/jeffrey-epstein-math-science-...