I kill ... I wound ... I will make mine arrows drunk with blood, and my sword shall devour flesh. Deuteronomy 32:39-42
Christians tend to ignore the Old Testament, and it's not hard to see why. But the New Testament God is still a killer; he's just saving most of his killings for later -- for the end of the world. And when the new God kills, he doesn't just kill his victims; he tortures them forever after they die.
Still, there are three New Testament killings: Ananias and his wife Sapphira, for not giving all their money to the church; Herod Aggripa, for not giving all the glory to God; and Jesus, because God needed someone to kill as a sacrifice to himself.