P.R. Laws Ap. tit. 32A, § IV, Rule 44
(A) Who may impeach. — The credibility of a witness may be attacked by any party, including the party calling the witness.
(B) Ways of impeaching. — The credibility of a witness may be attacked or supported through any pertinent evidence, including the following aspects:
(1) Demeanor while testifying and the manner in which he/she testifies.
(2) The nature or character of his/her testimony.
(3) The extent of his/her capacity to perceive, recollect or communicate any matter about which he testifies.
(4) The existence or nonexistence of bias, interest or any other motive for partiality of the witness, subject to the provisions in Rule 47(C).
(5) A statement previously made by him/her, subject to the provisions in Rule 47(A) and (B).
(6) The character or demeanor of the witness with respect to his/her truthfulness or untruthfulness, subject to the provisions in Rules 45 and 46.
(7) The existence or nonexistence of a fact testified by the witness, subject to the provisions in Rule 19.
(C) Impeachment and self-incrimination. — A witness does not waive his privilege against self-incrimination when examined upon a matter which only affects credibility.
History —Sept. 23, 2004, No. 450, § 1.