Heb. 6:4 For it is impossible for those who were once enlightened, and have tasted of the heavenly gift, and were made partakers of the Holy Ghost,
It doesn't say that they personally received the Holy Spirit, but only "made partakers of" Him, which could easily mean inclusion in church experiences where the Holy Spirit was active.
And similarly, I'm not aware of anywhere in the Bible where it teaches you can't "taste of the heavenly gift" if you're not already saved.
Nothing in your description indicates that he was ever saved.
1John 2:19 They went out from us, but they were not of us; for if they had been of us, they would no doubt have continued with us: but they went out, that they might be made manifest that they were not all of us.