According to Romans 1, everyone is aware of God's existence. So he is without excuse if he does not repent before he dies. I also highly doubt he had a powerful experience with the Lord, and was changed (knowing the Lord personally). When I accepted the Lord, I could not forget that experience I had with the Lord, and neither the many years of Him talking to me with His Word, and guiding me throughout life. I had a love, joy, and a peace that I had never known before. A person cannot forget these kinds of things and deny them. Then again, he did join a rock band and has tattoos. The Lord usually talks to a believer about putting away these things out of their life in time. If they refuse to do so, this can lead to them loving their rock and roll and tattoos and or other sinful things in their life over loving the Lord. But it seems to me: Based on the info. I have of him that he simply did not know ever truly the Lord Jesus Christ, and or he believed in a false version of Jesus that did not exist. For there are people who believe in a false version of Christ but this kind of belief is not knowing the real Jesus.