Unfair labor charges

Q. Our employee relations manager received a charge of an unfair labor practice (ULP) filed by the union with the National Labor Relations Board. In the ULP charge, the union alleges that when the secretary for our attorneys contacted a former employee—who had been discharged for misconduct—to schedule his deposition in his unemployment compensation proceeding, our company engaged in coercive interrogation in violation of the National Labor Relations Act and the Johnnie’s Poultry standard. There were no unfair labor practice proceedings pending before we received this ULP charge. What is Johnnie’s Poultry, and how is scheduling a deposition in a proceeding about a former employee’s unemployment compensation claim an unlawful labor practice?