OIC senior member Michael Capasse sent me this clear version of the Altgens photo.
Let's hone in on the doorway:
Clearly, there is nothing plaid, nothing checkered about that shirt.
Who would be crazy enough to say that those two shirt patterns are the same? And if that plaided Lovelady isn't Doorman, it means that the other plaided Loveladys aren't Doorman either.
So, it's bye-bye to the whole thing. It's all a ruse. Doorman is not wearing a plaid shirt. He is wearing Oswald's tweed shirt, and that's because he was Oswald.