The Catechism of the Summa - SECOND SECTION - A DETAILED SURVEY OF MAN'S RETURN TO GOD - XXIII. OF THE SINS AGAINST JUSTICE BY WORDS; OF THE JUDGMENT PRONOUNCED BY A JUDGE; OF THE SINS ON THE PART OF THE ACCUSED AND OF THE ACCUSER; AND ON THE PART OF THE WITNESS AND OF THE ADVOCATE (D)

(D)  
What is the third sin committed against justice in the act of judgment?

It is the sin of the accused who refuses to conform to the rules of the law (LXIX.).
 
What are these rules to which the accused must conform, under pain of sin against justice?

They are that he is bound to tell the truth to the judge when the latter, in virtue of his authority as judge, interrogates him; and that he must never defend himself by fraudulent means (LXIX. 1, 2).
 
If he is condemned, may not the accused decline to accept the judgment by making an appeal?

The accused, who is not allowed to defend himself by fraudulent means, has no right to make an appeal from a just judgment with the sole object of retarding the putting into execution of the judgment. He may make an appeal only when he is the victim of manifest injustice. Even then he must use his right within the limits established by the law (LXIX. 3).
 
Has one who is condemned to death the right to resist the sentence of condemnation?

The man who is unjustly condemned to death can resist even by violence provided no scandal is given. But if he be justly condemned, he is bound to submit to the penalty without resistance whatsoever; it is, however, permissible to make good his escape should he find the means, for no one is bound to concur in one's own punishment (LXIX. 4).

Next - The Catechism of the Summa - SECOND SECTION - A DETAILED SURVEY OF MAN'S RETURN TO GOD - XXIII. OF THE SINS AGAINST JUSTICE BY WORDS; OF THE JUDGMENT PRONOUNCED BY A JUDGE; OF THE SINS ON THE PART OF THE ACCUSED AND OF THE ACCUSER; AND ON THE PART OF THE WITNESS AND OF THE ADVOCATE (E)