They can do it. In my experience it was actually an interview with an FBI agent but it's under oath. It happened to me in connection with foreign travel to a communist country (duly reported by me prior to travel as required)when I had a Secret clearance.
They can do it. In my experience it was actually an interview with an FBI agent but it’s under oath.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
At any time anyone has the right to plead the fifth amendment. They will do exactly that.