If Ron Paul thinks Scooter Libby is NOT GULITY of the crime for which he was sentenced, then the "Constitutional" position is certainly NOT to lock innocent people up "[The President] SHALL shall have Power to Grant Reprieves and Pardons" Article 2, Section 2... unless Mr. Paul is following the Constitution of Communist China or something, a person who exposes liberty and freedom doesn't let innocent people get locked up when there is a constitutional way to free them.
Sorry, the Constitution explicitly gives the President the power to grant pardons in all cases except impeachments.
Paul also said an income tax is "Unconstitutional". Untrue. The Constitution also now allows an income tax since the 16th amendment was passed in 1916. It used to be "unconstitutional" to tax income PRIOR to that time, it no longer is -- just as banning guns is no longer constitutional since the 2nd amendment was passed. I think what Mr. Paul meant to say is he'd like to repeal the 16th amendment so an income tax WILL BE unconstitutional in the future.
Sorry, just because Ron Paul calls everything on the planet "unconstitutional" doesn't make it so. The Ninth Circuit court also likes to proclaim everything "Unconstitutional". The Constitution itself explains what is constitutional, not Ron Paul.
Ron Paul can denounce the existence of the U.S. Supreme Court as "unconstitutional" tomorrow if he wanted to, that wouldn't make it so.
If he doesn't like certain powers being granted in the Constitution, then he should work to repeal them -- not pretend they don't exist.
The BOR is more of a clarification than an actual amending of the Constitution. Most of the Founders considered them redundant, and already being implicit in the Constitution proper.
It appears that Ron Paul has accepted the Judgment of the Courts, and believes that Libby deserves no extra-ordinary Pardon. And that settles that.