Why don't you tell people what he did? After all that's the kind of information they're looking for and it doesn't really seem like he saw the error of his ways.
The matter was closed, I would like to leave it closed.
It mostly just reveals that you're in the US.
That's not a particular statement about the person, it gives no version of events. If pressed, explain that this all you can say. You simply don't recommend him.
(Of course, IANAL, TINLA)