Prayer For the Victim of a Violent Death--from the book "Praying in the Presence of Our Lord for the Holy Souls" by Susan Tassone
Lord our God, you are always faithful and quick to show mercy. Our brother (sister) [name] was suddenly (violently) taken from us.
Come swiftly to his (her) aid, have mercy on him (her), and comfort his (her) family and friends by the power and protection of the Cross.
We ask this through Christ our Lord. Amen.