I've traced the recordings from the comm system, there is an entry where he's speaking to someone, assuming it's his boss. His boss refers to him as Birkin. Well, I thought the voice sounded familiar, so I went back a ways. I found this advertisement for a company I'd never heard of before doing cosmetics.
He was going by a different name, and when I ran the two voices through the system, they were identical.
It isn't that hard to lie about your name when you're in the public eye.