[Az Joe]

It has been analyzed years ago and it isn't him. He was seen on one of the upper floors by law enforcement and his own supervisor within two minutes of the assassination.

Try this site: http://mcadams.posc.mu.edu/home.htm

[JoeA]

He wasn't seen on the upper floors, he was seen coming out of the lunch room, on the second floor, with a bottle of soda in his his hand by a policeman and supervisor of the book depository.

[GreatOne]

I did look and couldn't find anything dealing with this subject.