I doubt it was him, but it was someone and most likely a Cuban. I'm not going to dig up the Warren Commision report, but I think everyone in that photo has been identified except for that person.
That seems unlikely on its face. If the others in the photo were identified you show them the photo and say, "Who is that guy?" I find it hard to believe that none of them knew who he was. I suspect that it is known but hidden for some reason.
