How do you know for certain that it was the actual "Larry Johnson" and not some goofball with nothing better to do ?
It was established that the emailer was Johnson based upon the same IP addresses/servers which link back to his self-promoting website, aka "Berg Associates". Johnson operates online via Comcast/Earthlink/Netcom.
It was Johnson. And if it were NOT Johnson, he would certainly have come out and denied it already.
The fact is, I've got the original emails archived with all header and trace information, and they will stand up to ANY examination that anyone wants to conduct.
http://www.whois.sc/berg-associates.com
He used the same lcjohnso email address when he created berg-associates