I agree they should use the word “lie”. I’ve been astonished at the reluctance of Republicans to use the word. I don’t see what there is for a special prosecutor to investigate.
A SP could focus on all White House and SOS emails, and communications, meetings, staff interviews, and of course the testimony of the 31 survivors. A congressional committee could of course do all of the afore mentioned, but often lack focus, as new issues spin up, and a SP could be seen as impartial and not a political witch hunt, which is how the left will spin this.