'Innocent Blood' in the Bible

so that innocent blood will not be shed [by blood avengers] in your land which the Lord your God is giving you as an inheritance, and blood guilt will not be on you [for the death of an innocent man].

You shall not pity him [the guilty one], but you shall purge the blood of the innocent from Israel, so that it may go well with you.

Forgive Your people Israel whom You have redeemed, O Lord, and do not put the guilt of innocent blood among Your people Israel.’ And the guilt of blood shall be forgiven them.

So shall you remove the guilt of innocent blood from among you, when you do what is right in the sight of the Lord.