I answer that, As stated above (Q. 67, A. 3), when the process in a criminal case goes by way of accusation, the accuser is in the position of a party, so that the judge stands between the accuser and the accused for the purpose of the trial of justice, wherein it behooves one to proceed on certainties, as far as possible. Since however verbal utterances are apt to escape one's memory, the judge would be unable to know for certain what had been said and with what qualifications, when he comes to pronounce sentence, unless it were drawn up in writing. Hence it has with reason been established that the accusation, as well as other parts of the judicial procedure, should be put into writing.
Reply Obj. 1: Words are so many and so various that it is difficult to remember each one. A proof of this is the fact that if a number of people who have heard the same words be asked what was said, they will not agree in repeating them, even after a short time. And since a slight difference of words changes the sense, even though the judge's sentence may have to be pronounced soon afterwards, the certainty of judgment requires that the accusation be drawn up in writing.
Reply Obj. 2: Writing is needed not only on account of the absence of the person who has something to notify, or of the person to whom something is notified, but also on account of the delay of time as stated above (ad 1). Hence when the canon says, "Let no accusation be accepted in writing" it refers to the sending of an accusation by one who is absent: but it does not exclude the necessity of writing when the accuser is present.
Reply Obj. 3: The denouncer does not bind himself to give proofs: wherefore he is not punished if he is unable to prove. For this reason writing is unnecessary in a denunciation: and it suffices that the denunciation be made verbally to the Church, who will proceed, in virtue of her office, to the correction of the brother. _______________________
THIRD ARTICLE [II-II, Q. 68, Art. 3]
Whether an Accusation Is Rendered Unjust by Calumny, Collusion or
Evasion?
Objection 1: It would seem that an accusation is not rendered unjust by calumny, collusion or evasion. For according to Decret. II, qu. iii [*Append. Grat. ad can. Si quem poenituerit.], "calumny consists in falsely charging a person with a crime." Now sometimes one man falsely accuses another of a crime through ignorance of fact which excuses him. Therefore it seems that an accusation is not always rendered unjust through being slanderous.
Obj. 2: Further, it is stated by the same authority that "collusion consists in hiding the truth about a crime." But seemingly this is not unlawful, because one is not bound to disclose every crime, as stated above (A. 1; Q. 33, A. 7). Therefore it seems that an accusation is not rendered unjust by collusion.
Obj. 3: Further, it is stated by the same authority that "evasion consists in withdrawing altogether from an accusation." But this can be done without injustice: for it is stated there also: "If a man repent of having made a wicked accusation and inscription* in a matter which he cannot prove, and come to an understanding with the innocent party whom he has accused, let them acquit one another." [*The accuser was bound by Roman Law to endorse (se inscribere) the writ of accusation. The effect of this endorsement or inscription was that the accuser bound himself, if he failed to prove the accusation, to suffer the same punishment as the accused would have to suffer if proved guilty.] Therefore evasion does not render an accusation unjust.
On the contrary, It is stated by the same authority: "The rashness of accusers shows itself in three ways. For they are guilty either of calumny, or of collusion, or of evasion."