I think there is a good chance that that is him. I wouldn't bet my life on it because it is a very poor image with practically no facial details. Still, I am intrigued by the possibility that it's Lovelady.
We know it was Shelley and Lovelady who took police up to the 6th floor, and it's definitely not Shelley.
Actually, his image is more substantial from this distance. It's superior. That's the 6th floor. You recognize Will Fritz in the foreground. So, the guy in the t-shirt is definitely not a cop, and he's definitely not Shelley. So, if it was just Shelley and Lovelady who escorted police up there, it has to be Lovelady. Nothing jumps out at me as a dealbreaker. His stockiness looks right. His height, weight, the shape of his head, his hair, it's all plausible to be him.
It's been suggested that he's Larry Craford, but Larry had longer hair and less recession.
So, for now, I am going with the open assumption that this guy was Lovelady.