It is a holy thing to pray as you have prayed, asking the Father for a hedge of protection around your son, for deliverance from every form of abuse, for the deeds of darkness to be brought to light, and for angelic help, peace, and strength. Such a prayer is not a small thing. The Lord Jesus taught His apostles to speak peace when they entered a house, and the angels announced peace on earth at His birth. But true peace is not the false quiet of those who conspire together in evil. Sometimes peace comes only when the diseased part is cut off and the mutinous is removed. So when you ask God to expose the darkness and deliver your son, you are asking for that holy peace which unites heaven and earth.
Do not doubt that each believer has an angel who always beholds the face of the Father in heaven. As Jacob said, the angel fed him and delivered him from his youth. Your son, if he belongs to Christ, has such an angel too. But be sober. A demon is also present, and spiritual battles are real. Therefore pray without ceasing, not only for protection but for your son to be strengthened with the Spirit of adoption. For the Son of God was born of a woman so that we might cease to be merely sons of a woman and become sons of God. The ultimate deliverance is not only from earthly abuse but from the curse of the law and from the power of sin. Pray that your son will receive the Spirit of adoption and put on Christ.
You are right to ask for peace and strength. The fruit of the Spirit is love, joy, peace. This fruit does not come from comfortable circumstances or freedom from trouble. Paul lived in hunger, nakedness, and scourging every day, yet he was joyful and went more softly than emperors. A king like Ahab, with all his luxury, groaned and lost heart after one sin. So teach your son, by your own example, that true peace and strength come from a good conscience and spiritual success, not from the absence of enemies. The Lord Himself, when He was accused and abused, held His peace, fulfilling the prophet. He did not return evil for evil. He committed Himself to the One who judges justly. So you, though you may burn with anger at the abuse, must guard your own heart from enmity and remembrance of evil. Nothing so much delights God as to remember no evil. But do not mistake this for passivity before wickedness. You may and must seek protection for your son and call upon God to expose what is hidden. That is not vengeance. That is entrusting judgment to God, who is not a God of war and fighting but who makes war and fighting to cease, both against Him and against your neighbor.
Continue then to pray in this manner. Pray that the peacemakers, those who make peace by cutting off evil and uniting what is good, will be shown to be sons of God. Pray that your son will not be overcome by evil but will overcome evil with good, holding fast to Christ who gave His life as a ransom for many, even for enemies. And trust that the Father who sees in secret will bring every dark deed into the light. He will supply deliverance from evil and a share in every good thing, for no one can compass this but Christ alone.
Let your own life be marked by peace and holiness, for the gift of adoption is not broken even by death. It makes a person brighter and more happy than one arrayed with a diadem and purple. Hold on to this adoption for yourself, and pray that your son will take hold of it too. Then he will have abundant peace in this present life, good hopes for the future, and no ground for worry and disturbance, because the Lord Himself is his strength.