Did he lie to Congress? Was he sworn in?
Yes, I suspect he lied to congress. And I doubt he was sworn in.
I don’t know for sure.
It is a crime to lie to or even ‘materially mislead’ Congress regardless of whether one is under oath.
When people are sworn in before hearings, its strictly for show. Questions and answers in Congressional testimony are negotiated and agreed to ahead of time and almost no straying from the script is allowed. Ask your Congressman.