Wow, impressive!

My understanding, which could be wrong, is that Zarqawi said he murdered Berg and put the video up on his website. So when I see things like this:

Using voice analysis, they determined that Zarqawi - a one-legged mystery man with a $10 million bounty on his head - was the hooded figure who wielded the knife.

I really wonder. If you've got a video of a bunch of guys getting ready to kill someone, one of the possible killers has only one leg and he puts evidence on his website, why the hell does anyone need voice analysis?