If we are having a tough time getting absolute proof of who this impostor is then you know that there has to have been a massive cover-up that my have started years before he was ever anointed.
There is very little hard info that hasn't been changed all to heck out there. We can't put our hands on much of anything and say this is definite. I'm with some of the others here asking for DNA. Its much harder to fake any of that.
bkmk