Deuteronomy 21:9
“So shalt thou put away the guilt of innocent blood from among you, when thou shalt do that which is right in the sight of the Lord.”
And they shall answer and say, Our hands have not shed this blood, neither have our eyes seen it.
Be merciful, O Lord, unto thy people Israel, whom thou hast redeemed, and lay not innocent blood unto thy people of Israel’s charge. And the blood shall be forgiven them.
So shalt thou put away the guilt of innocent blood from among you, when thou shalt do that which is right in the sight of the Lord.
When thou goest forth to war against thine enemies, and the Lord thy God hath delivered them into thine hands, and thou hast taken them captive,
And seest among the captives a beautiful woman, and hast a desire unto her, that thou wouldest have her to thy wife;
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Cross-References
“Thine eye shall not pity him, but thou shalt put away the guilt of innocent blood from Israel, that it may go well with thee.”
“Then the elders of his city shall send and fetch him thence, and deliver him into the hand of the avenger of blood, that he may die.”
“When thou shalt hearken to the voice of the Lord thy God, to keep all his commandments which I command thee this day, to do that which is right in the eyes of the Lord thy God.”
“And the Lord said unto Jehu, Because thou hast done well in executing that which is right in mine eyes, and hast done unto the house of Ahab according to all that was in mine heart, thy children of the fourth generation shall sit on the throne of Israel.”
“And shed innocent blood, even the blood of their sons and of their daughters, whom they sacrificed unto the idols of Canaan: and the land was polluted with blood.”