FBI building, Newark, NJ - Government agent so ashamed of her actions and job, refuses to ID

We were at the FBI building in Newark NJ when we were confronted by a person claiming to be a government agent. We were not sure if she was, but she claimed to work for a domestic terrorist group ( either the fbi or FPS ), but would not specify, so we asked for ID....she must be so ashamed of her actions and job, she refused multiple times.