Can. 1572

In evaluating testimony, the judge, after having requested testimonial letters if necessary, is to consider the following:

1/ what the condition or reputation of the person is;

2/ whether the testimony derives from personal knowledge, especially from what has been seen or heard personally, or whether from opinion, rumor, or hearsay;

3/ whether the witness is reliable and firmly consistent or inconsistent, uncertain, or vacillating;

4/ whether the witness has co-witnesses to the testimony or is supported or not by other elements of proof.