Pedro was accused of the crime of murder before the RTC and was found guilty of homicide. His counsel, Atty. Nestor, told him that he will file an appeal before the Court of Appeals (CA) because he believes that the claim of self-defense of Pedro will be given merit by the appellate court and that he will be acquitted. Pedro explains that he is amenable to the penalty imposed upon him. Despite the opposition of the accused, Atty. Nestor went on with the appeal. The CA decided that the conviction should be for murder in view of a qualifying circumstance. A petition with the High Court proved futile. Pedro hires you to file a disbarment suit against Atty. Nestor. What canon or rule of the CPR will you use as ground for the suit? Explain. (5%)