'Blood guiltiness' in the Bible

So innocent blood will not be shed in the midst of your land which the Lord your God gives you as an inheritance, and bloodguiltiness be on you.

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

When thou buildest a new house, then shalt thou make a parapet to thy roof, so shalt thou not treasure up blood-guiltiness against thy house, for he that is in danger of falling might fall therefrom.