'Murderer' in the Bible

‘But if he struck his victim down [intentionally] with an iron object so that he died, he is a murderer; the murderer shall certainly be put to death.

If he struck his victim down [intentionally] with a stone in hand, which may cause a person to die, and he died, he is a murderer; the murderer shall certainly be put to death.

Or if he struck his victim down [intentionally] with a wooden object in hand, which may cause a person to die, and he died, he is a murderer; the murderer shall certainly be put to death.

The blood avenger shall himself put the murderer to death; he shall put him to death when he meets him.

or if, in enmity, he struck the victim down with his hand, and he died, the one that struck the victim shall certainly be put to death; he is a murderer. The blood avenger shall put the murderer to death when he meets him.

‘If anyone kills a person [intentionally], the murderer shall be put to death on the testimony of [two or more] witnesses; but no one shall be put to death on the testimony of [only] one witness.

Moreover, you shall not accept a ransom [in exchange] for the life of a murderer guilty and sentenced to death; but he shall certainly be put to death.

Now Elisha was sitting in his house, and the elders were sitting with him. And the king sent a man ahead of him [to behead Elisha]; but before the messenger arrived, Elisha told the elders, “Do you see how this son of [Jezebel] a murderer has sent [a man] to remove my head? Look, when the messenger comes, shut the door and hold it securely against him. Is not the sound of his master’s feet [just] behind him?”

“The murderer rises at dawn;He kills the poor and the needy,And at night he becomes a thief.