Homicide: Felonious: Joab
Source: Nav
2 Samuel 3:24–27
So Joab went to the king and said, “What have you done? Look, Abner came to you. Why did you dismiss him? Now he is getting away! / Surely you realize that Abner son of Ner came to deceive you and to track your movements and all that you are doing.” / As soon as Joab had left David, he sent messengers after Abner, who brought him back from the well of Sirah; but David was unaware of it.
2 Samuel 20:9, 10
“Are you well, my brother?” Joab asked Amasa. And with his right hand Joab grabbed Amasa by the beard to kiss him. / Amasa was not on guard against the dagger in Joab’s hand, and Joab stabbed him in the stomach and spilled out his intestines on the ground. And Joab did not need to strike him again, for Amasa was dead. Then Joab and his brother Abishai pursued Sheba son of Bichri.
1 Kings 2:5
Moreover, you know what Joab son of Zeruiah did to me—what he did to Abner son of Ner and Amasa son of Jether, the two commanders of the armies of Israel. He killed them in peacetime to avenge the blood of war. He stained with the blood of war the belt around his waist and the sandals on his feet.