I remember one time when I was still working, I was in the ladies room, having a conversation with a co-worker, and the topic of one of the Deputy Superintendents came up. Back then we called them Dep for short, and in my conversation, I referred to him as an inept Dep. We laughed about it. As soon as I walked out of the bathroom, I was told to report to the Deputy Superintendent's office. He advised me that he had overheard my comment through the open window of the ladies room, as he walked by outside of the building, and asked me what I had to say for myself. I told him that I was sorry that he had overheard my comment, but that it was a private conversation, and that I wasn't sorry that I had said it. He tried again to get me to apologize, and I reiterated that I wasn't going to apologize for something I'd said in a private conversation. I think he was so flustered because I wasn't groveling, begging for his forgiveness, that he sent me on my way, and I never heard another word about it.
You might also have asked why he was listening at the window to the ladies room.
Too bad you didn’t report him for hanging around the ladies’ restroom. Only a pervert would have done that.