You are an attorney, and the local court has appointed you to represent a defendant who has been charged with aggravated assault and battery. The prosecutor originally intended to charge attempted murder. The victim suffered serious injury, and the police suspected that a weapon of some type was used, but never was able to find one. The defendant has maintained that there was no weapon. Your client tells you that he has a friend that you can call as a witness. Even though this friend was not actually present at the incident, he is willing to claim that he saw the altercation and will testify that the defendant acted in self-defense, and without a weapon. You refuse to call a witness that you know will not tell the truth. This action would indicate your view that you are serving as your client’s: