Please tell him to pray this:
Dear Lord, I pray that you will not remember the sins of my youth, nor my transgressions. Please think of me according to Your mercy and for Your goodness' sake, O LORD. Lord I turn from all of those sins that I committed and I ask for Your help in washing the memory and thoughts of that sin completely from my mind. Please restore me to faithful obedience to Your Word, and fill me with Your Holy Spirit anew, so that I may keep Your commands all the days of my life." (Based on Psalm 25:7)
in your powerful name i pray you Jesus amen