To Antonin Scalia, "Justice" is Only His Job Title

For "justice" is clearly not what he has on his mind:

“This court has never held,” Justice Scalia wrote, “that the Constitution forbids the execution of a convicted defendant who had a full and fair trial but is later able to convince a habeas court that he is ‘actually’ innocent.”

How can one have a "full and fair trial" when the prosecution witnesses are lying? And how can anyone whose job is the dispensing of justice have no qualms about executing an innocent man?