In the Hughes film, you see Harkness walk across the frame wearing red shoulder tabs. Something of a contradiction, eh?
In the photos taken of DP in the aftermath of the shooting, you'll see a number of officers wearing Ike jackets. I was wondering if Harkness had one on his trike, and put it on before he and King tore west on Main. At first, I thought that might be the case. Maybe it still is. But then I noticed something about Harkness' uniform in the Hughes film. It looks like his shirt is about a half size too big for him, draping forwards over his torso. His chevrons, DPD shoulder badge, and red tabs are all riding well forwards. The tabs themselves appear to be riding the front of Harkness' trapezius rather than atop it, pointing forwards more than upwards. In that position, they may not have been readily visible at the angle shown in the Martin film.
Once again Mitch I have to bow to your superior knowledge of the film record regarding this case. I have seen the Hughes film so many times and not made the connection with Harkness:
As you point out, the front of his shirt seems to slump forward, the red shoulder tabs are noticeably forward and I can see how they might not be seen in the Martin film.
I suspected he was wearing glasses in the Martin film but couldn't get a clear shot of it and thought it might just be some kind of artefact on the film. But here we can clearly see that Harkness wears glasses.
However, this takes us back to square one.
The point I was making in my earlier post was that Harkness wasn't the sergeant seen with Sawyer in front of the TSBD in the Alyea clip. You have demonstrated, beyond any doubt, that the sergeant in front of the steps is not Harkness:
So who is this sergeant?
The only clue is Barnett's testimony, that the sergeant was Howard and that they both went to the front of the TSBD, exactly where we see the sergeant in the Alyea clip.
There seems to be no other credible candidate for this sergeant.
In Dealey Plaza? Only Harkness. The next closest one I know of offhand was Bellah who was on Stemmons where the Northbound on ramp from Elm merged into the freeway proper. IIRC, there were only two or three sergeants assigned to the parade route downtown.
Bellah was a cycle cop and would have been wearing a rounded white helmet so it's not him in the Alyea clip.
It's definitely not Harkness.
It can only be Howard.
I've heard a few different stories as to the meaning of the white hats. Most of these say that the traffic division guys wore them while out on duty. I suspect they did so to increase their visibility in traffic. After all, a great deal of their jobs involved standing in the street, and I know other police departments did the same or similar for their traffic cops for just that reason. I've also heard that the higher-ups, like Curry and the assistant chiefs, also wore the white hats. But that may only have been for ceremonial reasons.
It may just be to define between Traffic and Patrol divisions.