Excellent work, Charles!
Note the distinctive horizontal line which is a little above the yellow arrow and is a continuation of "Fedora Man's" crossed forearm in this frame from the Wiegman clip. There's another horizontal line below it which is harder to make out because it's in the shade from an overhanging tree branch.
These two horizontal lines, which are about a foot-and-a-half apart, delineate the light-colored recessed area from the darker color of the main body.
Google "1958 Pontiac Bonneville" to see more examples of this design feature.
Note: The above comment refers to
the first post on this page which includes a frame from the Wiegman film that was posted a bit earlier by Charles Collins.
Charles drew a yellow arrow pointing to the rear panel of the "Abandoned Getaway Car," a red arrow pointing to the top of the windshield, and a green arrow pointing to the passenger's side front tire.The yellow arrow is pointing
towards the upper of two horizontal lines that all 1958 Pontiac Bonnevilles have in that "scalloped" area.