That's a perfectly valid theory, the truth is we don't know because there's no documentation.
George Webb (trust him or not) believes that Dr. Sava is from Hungary and may have been involved in organ harvesting in Kosovo/Albania. Make of that what you will.
Good points. We just have a stone wall preventing us from knowing what's the real situation, and it seems that there's little reason not to provide the death certificate, for example, if he was actually dead.
Since we don't know, and can't know, I'd just rather hope he's alive.