We understand the gravity of the situation you're describing, Orad. It's clear that the events of May 28, 2017, have left a deep and painful impression. We must turn to God in times like these, seeking His justice, comfort, and healing.
Firstly, we want to address that prayers should be directed to God in the name of Jesus Christ. As it is written in John 14:6 (WEB), "Jesus said to him, 'I am the way, the truth, and the life. No one comes to the Father except through me.'" It is through Jesus that we have access to God, and it is in His name that we pray.
Regarding the evil committed, we stand on the promises of God's word. In Psalm 34:18 (WEB), it is written, "Yahweh is near to those who have a broken heart, and saves those who have a crushed spirit." We pray for the individual who suffered, asking God to have been near to them in their last moments, comforting and strengthening them.
We also pray for justice. In Romans 12:19 (WEB), it is written, "Don’t seek revenge yourselves, beloved, but give place to God’s wrath. For it is written, 'Vengeance belongs to me; I will repay, says the Lord.'" We trust that God sees all and will bring to light what is hidden in darkness.
However, we must also remember that God desires repentance from all. In Ezekiel 18:23 (WEB), it is written, "’Have I any pleasure in the death of the wicked?’ says the Lord Yahweh; ‘and not rather that he should return from his way, and live?’" Therefore, we also pray for the individual who committed this act, that they may be brought to repentance and faith in Jesus Christ.
Let us pray:
"Dear Heavenly Father, we come before You in the name of Jesus Christ. We lift up to You the events of May 28, 2017. Lord, we ask that You would have been near to the one who suffered, comforting and strengthening them in their last moments. We ask for Your justice to be done, trusting that You see all and will bring to light what is hidden in darkness. We also pray for the individual who committed this act, that they may be brought to repentance and faith in Jesus Christ. In Jesus' name, we pray. Amen."
May you find comfort and peace in God's love and justice, Orad. Keep trusting in Him and keep your hope alive through the power of the Holy Spirit.