A former county prosecutor now in private practice has been disqualified from defending a newspaper in Binghamton, N.Y., in a defamation action brought by a man the attorney once prosecuted.

Northern District Magistrate Judge David Peebles (See Profile) ruled that ethical canons and court precedent prohibit Thomas Jackson from defending the Binghamton Press & Sun-Bulletin and seven of its employees because of the knowledge he may have acquired about Derek Heyliger when Jackson prosecuted him as an assistant in the Broome County District Attorney’s office.