It was quite recently that I found out about Detective Blackie Harrison in the Jackson photo. Before that, I presumed that that was a journalist holding a microphone trying to catch something that Oswald was saying. But no, that is supposed to be Blackie extending his arm to interfere with what "Ruby" was doing. So, he was reaching out to subdue a shooter there. But, who would do that while continuing to smoke?
"You cut that out now, Jack. You're putting me off this fine cigar."
Is that the caption for this photo? It might as well be.
Again: who would do that? Nobody would. And least of all a detective. He certainly doesn't look like someone engaged in a life-or-death struggle.