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:.

Moral agent

Explanation:  

A moral agent is one of the type of person that has ability to decide whether the given decision is right or wrong and the person is morally judge the given situation.

 The main responsibility of the moral agent is that it makes the various types of justified decisions and they take responsible actions on the basis of given situation.  

 According to the given question, the given action is basically indicating views that the person is serving as clients's moral agent. Therefore, Moral agent is the correct answer.

answer; taking detailed notes during the interview;

answer; decipher the motives for why people behave the way they do;