The term used in most bibles for murder is "kill" which is not a correct translation. The translation error is most likely due to translation prejudice.
Exodus 20:13 "Thou shall not murderH7523."
Exodus 21:12-15 "He that smites a man, so that he die, shall be surely put to death. And if a man lie not in wait, but God deliver him into his hand; then I will appoint thee a place whither he shall flee. But if a man come presumptuously upon his neighbor, to slay him with guile; thou shall take him from mine altar, that he may die. And he that smites his father, or his mother, shall be surely put to death."
Exodus 22:2 "If a thief be found breaking up, and be smitten that he die, there shall no blood be shed for him."
If you killed a thief in your home you were not put to death for it.
Numbers 35:16-34 "And if he smite him with an instrument of iron, so that he die, he is a murderer: the murderer shall surely be put to death. And if he smite him with throwing a stone, wherewith he may die, and he die, he is a murderer: the murderer shall surely be put to death. Or if he smite him with an hand weapon of wood, wherewith he may die, and he die, he is a murderer: the murderer shall surely be put to death. The revenger of blood himself shall slay the murderer: when he meeteth him, he shall slay him. But if he thrust him of hatred, or hurl at him by laying of wait, that he die; Or in enmity smite him with his hand, that he die: he that smote him shall surely be put to death; for he is a murderer: the revenger of blood shall slay the murderer, when he meeteth him. But if he thrust him suddenly without enmity, or have cast upon him any thing without laying of wait, Or with any stone, wherewith a man may die, seeing him not, and cast it upon him, that he die, and was not his enemy, neither sought his harm: Then the congregation shall judge between the slayer and the revenger of blood according to these judgments: And the congregation shall deliver the slayer out of the hand of the revenger of blood, and the congregation shall restore him to the city of his refuge, whither he was fled: and he shall abide in it unto the death of the high priest, which was anointed with the holy oil. But if the slayer shall at any time come without the border of the city of his refuge, whither he was fled; And the revenger of blood find him without the borders of the city of his refuge, and the revenger of blood kill the slayer; he shall not be guilty of blood: Because he should have remained in the city of his refuge until the death of the high priest: but after the death of the high priest the slayer shall return into the land of his possession. So these things shall be for a statute of judgment unto you throughout your generations in all your dwellings. Whoso killeth any person, the murderer shall be put to death by the mouth of witnesses: but one witness shall not testify against any person to cause him to die. Moreover ye shall take no satisfaction for the life of a murderer, which is guilty of death: but he shall be surely put to death. And ye shall take no satisfaction for him that is fled to the city of his refuge, that he should come again to dwell in the land, until the death of the priest. So ye shall not pollute the land wherein ye are: for blood it defileth the land: and the land cannot be cleansed of the blood that is shed therein, but by the blood of him that shed it. Defile not therefore the land which ye shall inhabit, wherein I dwell: for I the LORD dwell among the children of Israel."
Deuteronomy 5:17 "Thou shall not murder."
Luke 22:35-38 "And he [Christ] said unto them, When I sent you without purse, and scrip, and shoes, lacked ye any thing? And they said, Nothing. Then said he unto them, But now, he that hath a purse, let him take it, and likewise his scrip: and he that hath no sword, let him sell his garment, and buy one. ..... And they said, Lord, behold, here are two swords. And he said unto them, It is enough."
Notice that Christ encouraged the ownership of a weapon for self defense.
H7523 A primitive root; properly to dash in pieces, that is, kill (a human being), especially to murder: - put to death, kill, (man-) slay (-er), murder (-er).
The Church of God Proclaimed