The Presbyterian Moderator, Dr John Dixon, pledged support for the Irish and British governments in bringing "wicked men" to justice when he spoke at the funeral in Omagh of Mr Fred White and his son, Bryan.
"But I say further, on the authority of the good Lord, such men of violence will have nowhere to hide before the judgment seat of Christ. One day, they too will die and will have no escape route from divine retribution."
He added: "Should the evil, wicked men who planned and perpetrated this vile obscenity ever listen to those who speak the word of God, may they be stunned to realise that Almighty God not only knows the desperate depravity of their hearts, but He has declared His righteous judgment against their sin in shedding innocent blood. He will not turn a blind eye to those who defy His command: You must not kill."
Coming into the house of God gave a new perspective, said Dr Dixon. It had done so for David the Psalmist who lived in a violent sin-ruined society and they could resonate with his feelings as he wrote in Psalm 73: "I had almost stopped believing, I had almost lost my faith . . . I saw wicked people doing well. They are not suffering . . . They wear pride like a necklace and put on violence as their clothing. They say `How can God know? What does the most high God know'?"
The Psalmist had continued: "I tried to understand all this, but it was too hard for me to see until I went to the temple of the Lord. Then I understood what will happen to them . . . You, Lord, cause them to be destroyed. They are swept away by terrors. Lord, when you rise up, they will disappear."
Dr Dixon said: "May those words stabilise the people of God today, particularly those who mourn, are maimed and suffering and all who, like the Psalmist, are unsettled by the activities of evil men."
The Rev Arthur O'Neill said they should hear the voice of God, whose son, Jesus Christ, was on the receiving end of evil.
"In His word He has asked not to be overcome by evil but to overcome evil with good. To do that is not easy. It never was and never will be an easy option. Still, the cross of Christ proclaims the message of victory over sin and death. He who calls us to a better way asks that there be no retaliation for this monstrous act."
He said: "Our hearts go out today to all whom Fred and Bryan loved and cherished. In the past days, we have witnessed the anguish, bitter grief and hot tears of this family. We have seen them waiting, waiting and waiting through the long watches of the night. Hoping, hoping and hoping against hope that with the coming of the dawn word would come that Fred and Bryan were safe. It was not to be."
The Presbyterian Church asked the media to respect family privacy at the funerals of Mr Fred White and Bryan, and of Ms Vida Short and Ms Ann McCombe.