I just saw the photos last night for the first time. First thing I said was "wait a second that's a white guy in a T-shirt not a black guy in a camo vest".
My gosh it does absolutely no good to give description of bad guys to look for if they can't get the description even close.
I heard several times he was “a black male in camo”.
And later, I heard they had detained that particular man, hiding under a bench. My thinking is that the guy they detained was former military (or current) and was taking cover like any one who has a lick of sense (and unarmed) would have done.