Oswald in the doorway: the blog of the Oswald Innocence Campaign, by Ralph Cinque

Here, Amy Joyce points out that if the vertical stripe on the bow of the hat was the same color as the hat, we'd see it in these frames of the shooter in the Phenix film.

So, what it means is that the light vertical stripe in the hat in the Jackson photo is a definite sign of tampering. I don't mean that it might be a sign of tampering. I mean that it definitely is a sign of photographic tampering, and there is NO CHANCE that it came out of Bob Jackson's camera that way.