Thanks for a question, instead of the normal nonsense. I have thought of it this way. He was the governor of the second largest state in the country and that still stands today. Him coming forward and saying that he witnessed the driver's shot (which he clearly did) would have been diametrically opposed to what the government and media gave to the American people as the truth.
Jackie was looking at jfk, so she didn't see Greer shoot although she may have realized it but who knows.
Connally saw Greer shoot jfk and took it to his grave. They didn't say anything because it was a massive cover-up.
Connally said he saw the fatal shot and quickly corrected himself but his reaction when looking at Greer proves he slipped up. Watch him hit the floor in horror once he realized Greer shot Kennedy.
Obviously, at least the major wound that I took in the shoulder through the chest couldn't have been anything but the second shot. Obviously, it couldn't have been the third, because
when the third shot was fired I was in a reclining position, and heard it,
saw it and the effects of it,
rather--I didn't see it, I saw the effects of it--so it obviously could not have been the third, and couldn't have been the first, in my judgment.