Hmmm... I always assumed he was Mr Lovelady. But where's the conspicuous bald spot?
And it looks to me like he has a light-colored garment on over his tshirt.
The image is quite fuzzy and the lighting poor so hard to draw too many conclusions re the bald spot I think. There dies seem to be a colour change in the tee shirt that looks like another garment. Is the another image of the tee shirt Lovelady wore to compare? Have seen glimpses under the red patterned shirt.
The face and profile look like Lovelady and he said he was on the sixth floor but open to different ideas.