Subject: William Orchard and Patrick Schannes
TLR
I had exchanged emails with William Orchard several years ago when he was developing his analysis. He understands Sherry's analysis of movement, stating, "The larger movement of President Kennedy’s head can be explained by terminal velocity, hydrostatic shock and cavitation, which describe the movement of a fluid filled container into the direction of a bullet strike.” He places the headshot shooter on the railroad overpass.
Also of note the work of Patrick Schannes’ JFK: Le Complot:
http://www.jfk-lecomplot.com/english/6/ He places the headshot shooter in “the south parking lot”. His drawing of the headwound is instructive. He found after placing his site in 2009 that he and Sherry were in agreement on the origin of the headshot.