I remember seeing a post in a website that said the evidence from a voice analysis proved that it was him. Supposedly they took a voice recording they had of his, and matched it with the audio that is referenced to in this post. And it was a perfect match. Sorry, but I don't have a link that I could point to, but hopefully someone has that link, and could post it.
I remember, as well. Unfortunately, I didn't save it either.
(post is archived)