en_tn/act/22/20.md

the blood of Stephen your witness was spilled

Here "blood" stands for Stephen's life. To spill blood means to kill. This can be stated in active form. Alternate translation: "they killed Stephen, who testified about you" (See: rc://en/ta/man/jit/figs-metonymy and rc://en/ta/man/jit/figs-activepassive)