The investigator went on to bluff that there was a video camera in the room, though the recording, with its definitive proof one way or the other, would not be accessible until later.

So I think he would have been much better off to say "actually I've never done that, but I have done this" and to be honest than to try and bluff his way through answering the question.

I am thinking of a young guy recently who tried to bluff his way through the question and to claim that he could do something that clearly he had never done.