Isn't it your view that the south knoll shooter was on the overpass, specifically behind the banister on the south end, where it slants eastward toward the parking lot? I believe this is what you have posted previously on the Lancer forum.
Interestingly, there is one significant witness who thinks a shot came from the overpass. At the 1996 December in Dallas conference, Mark Oakes showed a video interview with Dallas motorcycle officer H.B. McClain (he of the the stuck microphone fame), who states, "I think he was shot from that overpass and the picket fence." (Mark Oakes, "Witnesses to History," Kennedy Assassination Chronicles, Winter 1996-97, p. 49.)
This photo is from the ideal trajectory point of the overpass, in which Elm St. is most directly coming toward the proposed overpass shooter's line of sight.
However, there is scant evidence of anyone on the south side of the overpass, in contrast to the numerous "railroad workers" hanging right right above the Elm St. motorcade route.
Thanks Tim, Al, Ron: Good points. AND Good Pictures!
I think this south shooter was about even with the rail road tracks where the overpass has that south cover hooked wall, which is only a few feet from the (west) cornor edge of the parking lot or perhaps even on the tracks in line with the 'kill zone'. This position is about two or three feet higher than the south edge of the parking lot.
The reason I say this is because this position would be shooting down and direct in stright line with the Limo. If the shooter was at curb side he would be shooting slightly up hill (a low shoot into the Limo through the windsheld) and no cover for escape. I think the escape route was over the railroad tracks.., the same route (except further south of us) as Sergio and I left the Plaza. At the time there were weeds and a vacant, muddy parking area at the base of the railroad hill. (west side of tracks-- cover all the way down to Industrail Blvd.)