spill blood
To kill someone violently. A noun, pronoun, or adjective can be used between "spill" and "blood." The soldier was arrested and court-martialed for spilling blood in the village near the military encampment. I will not rest until I find the lunatic who spilled these people's blood.
spill (somebody’s) ˈblood
(formal or literary) kill or wound people: Nothing can justify spilling innocent blood.