Really unravel the voice of a scammer?

Question

Sound processing

Some person tried to blackmail me, I didn’t get hooked and he didn’t write anymore.
There is a video recording on YouTube, he is there in a mask with a modified program voice, he takes me to a cheap show-off). There are suspicions that I know this person personally.
Is it possible to go back "from smoking" and return the real voice?
I'm just very far from it. Yes, and I put the tags from the bulldozer)