Negative self-serving evidence deserve less weight than testimony on affirmative matters

This Court has consistently ruled that denials, if unsubstantiated by clear and convincing evidence, are negative self-serving evidence which deserve no weight in law and cannot be given greater evidentiary weight over the testimony of credible witnesses who testify on affirmative matters. As between the positive declarations of the prosecution witness and negative statements of the accused, the former deserves more credence. [G.R. No. 118770. December 6, 1996]