"In our judgment, evidence which was 'not available at the extradition hearing' means evidence which either did not exist at the time of the extradition hearing, or which was not at the disposal of the party wishing to adduce it and which he could not with reasonable diligence have obtained."
"The threshold remains high. The court must still be satisfied that the evidence would have resulted in the judge deciding the relevant question differently, so that he would not have ordered the defendant's discharge. In short, the fresh evidence must be decisive."