This is what Nicholas Turner originally said:
This is what I am responding to. If you can't follow along then just ignore.
Your star witness for the JDT murder, Helen Markham, supposedly identified LHO by a profile view only so what is your point?
Still no answer on who the LHO lookalike was, huh?
Even starting from where you'd prefer, you still totally missed it. This is the exchange between you and Nick:
Nick: 6.5mm Mannlicher--Carcano is a piece of ammunition.
Rob: So a 6.5 mm is exclusive to a M-C? Can you support this?
Nick: A 6.5 Mannlicher-Carcano is the name of a particular design of cartridge. There are other 6.5 mm calibre cartridges if different designs. You can look it up online.
Rob: I don't want to. You made it sound like only a M-C could fire a 6.5 mm cartridge. Is this true or not?His original line simply doesn't assert, imply, or insinuate that "6.5 mm is exclusive to a M-C," as you thought. His reply to your first question should have cleared up that misapprehension on your part, but you doubled down. When he gave you a sage bit of advice, that you could easily look it up yourself, you just "didn't want to," as you put it.
That is, you got it wrong in the first place, refused to accept that you misunderstood even after he clarified his statement (which he shouldn't have needed to do in the first place). Then decided to defiantly maintain your ignorance on the subject at hand. You're a real pro!
That being said, as far as I'm concerned, the star witness in the Tippit killing is Ted Callaway. Markham herself said that she wasn't sure until Oswald turned sideways, which of course implies that she did that the he at least resembled the shooter from the front. Table it out, and the difference should be self-evident:
Full Frontal Profile
Markham Maybe Yes
Penn Maybe No
The case given the FBI was made by SMI. The only ammo we know that Oswald had was WCC, and the FBI determined that the Penn case wasn't fired from the Oswald rifle anyway. At that point, there was no point in continuing to pursue the identity of the man in Penn's pasture. Your demand that everyone else identify the man is nothing more than a a way to avoid facing the fact that there was no lead to be found at the Penn property.