The Second Murderer is a blunt fellow who is less secure about his job than he would like.
He is irritated about the fact that he has a conscience, but he has learned to control it, though it sometimes takes a while. The promise of gold always helps the process. Clarence speaking to him and his companion weakens his resolve, and he attempts to bolster himself by giving Clarence reasons why he deserves to die. Not wanting the man to die under an illusion, he lets him know that it is Richard who has sent them. He distracts Clarence in the oldest way to give the First Murderer a chance to stab him, but seeing Clarence dead truly bothers him and he runs off, refusing any part of the fee.