@mbush I really hope you can get an original still from the video. I'd love to hear what you may see! I also, scoured the initial backseat still that was published early on in the investigation. However, unfortunately, I did not save it to my computer.
As you pointed out, the current clear picture of her in the backseat has been continually and heavily photoshopped since it's initial release. In this case, an area that was most (troublingly) overtly highlighted, is the area of the right side at the shoulder area to the chest. On the original still, the blurred area was questionable as to whether it was reflection from substance, or fabric refraction.
Another area, her face, with her deep set left eye with darkened circle of the eye socket, lack of "tanning" around her nose, darkened area on each side of the forehead, and elongation of her jaw. All of which have been subsequently photoshop "corrected" to the hilt.
Whatever the case may be, the extensive photoshopping of the original still is really incredibly odd, to say the least.