Clemens got a break from Andy Pettitte, who did a complete 180 degree turn and expressed doubt that Clemens actually used banned substances. After the Mitchell report he was unequivocal about the steroid use. I think Andy lied on the witness stand.

Anyway I don't think the acquittal clears the path for Clemens into the Hall of Fame. While the prosecution's case fell apart and they couldn't prove the elements of the perjury beyond a reasonable doubt, there is substantial evidence that Clemens used banned substances.