I'd think that any time an employee is going to be questioned by a state investigator or law enforcement official regarding something you've already gotten your bank's legal counsel involved in... the employee him/herself ought to have the benefit/right of legal representation standing beside them... and/or (at the very *least*) someone from HR to help look out for their best interest (and the bank's!) in the room!
Also, you say an employee "violated bank policy and procedures", but "it was not a employee problem". Those 2 statements don't go together in my mind. What sort of a situation *would* you get HR involved in, if not when an employee violates bank policy and procedures, necessitating an investigation by the state and legal counsel to get involved??? Seems to me this IS an employee problem. Perhaps not in the sense of the employee benefitting financially from the transaction, but regardless of WHY the employee broke all your policies and procedures, don't you think he/she needs to be retrained and/or disciplined?
_________________________
"Gratitude makes sense of our past, brings peace for today, and creates a vision for tomorrow." - Melody Beattie