Have you actually looked at the National Geographic film snippet showing Amos Euins sitting inside Inspector Sawyer's car? The car on the other side of the street is easily seen in that snippet. The telltale taillight/brake light too.
Dear Sonderführer Storing,
You're such a lousy communicator.
When you say, "the car on the other side of the street," I guess you mean some car parked on the TSBD side of Elm Street Extension.
If so, what makes you think the
two light-colored cars (one of which appears to be a Ford and the other of which is almost completely obscured by the front of Sawyers' car) in the National Geographic film were parked there when Wiegman and Darnell were filming about an hour earlier during the shooting?
In the Wiegman clip, the decorative horizontal "scalloped" part of the rear panel of your 1958 Pontiac Bonneville Abandoned Getaway Car can be seen immediately to the left of the crossed arm of "Fedora Man on the Island."
You mistakenly believe that that distinctive part of your 1958 Pontiac Bonneville Abandoned Getaway Car is part of another car on the other side of Elm Street Extension in the Wiegman film.
Charles has already pointed out not only the "scalloped area" of the 1958 Pontiac Bonneville in the Wiegman clip, but its right front tire and windshield as well.
Bottom line: Your "Abandoned Getaway Car" in Darnell was there all along!
Get over it and try to cook up some other tinfoil-hat JFKA conspiracy theory now.
This one has been blown out of the water, dude.
-- Tom