Barr is setting the bar on what the next rounds of evidence needs to show the public. He is there to maintain the illusion that this is not happing. Almost as if he is tamping down a fire line.

This is a distraction the way a magician would distract. The thing has been done. Now to mime a bit more performance out, get distance from the slight so people won't remember when exactly it was done. Got to have a dramatic reveal.