This researcher claims the fatal shot came from someone in the storm drain (manhole) on Elm Street. Very interesting claim indeed.
Entrance to a storm sewer at the point where the Stockade Fence meets the Triple Underpass.
The storm sewer in front of the Grassy Knoll on Elm Street, and the view that a shooter would have had.
Another compelling series of videos from another researcher done recently by Leroy Blevins
.............Please watch these videos carefully. He's really on to something.