The feel I got from the Gordon Arnold/Canover Hunt interview was that Arnold recalled seeing Sarti previously, but Arnold could not with certainty place his Sarti sighting at Dealey Plaza on 11/22/63. This I believe gives credibility to all the other details that Arnold revealed during that interview.
To my knowledge, nobody other than Arnold has ever claimed to be in that dirt area between the picket fence and the Flat Concrete Walkway. This makes Arnold's telling of his standing atop a dirt pile/elevated, and adding that dirt in general had been pushed around back there a revelation. None of the Line-Of-Sight (LOS), or measured angles toward the Kill Shot "X" on Elm St, have taken into account that there were various positions back there that were Elevated above ground level. With there being black shadows from the picket fence to about 4 feet out toward the flat cement walkway, along with possible elevated mounds of dirt, does present the possibility of a shooter on the (E) side of the picket fence vs the routinely accepted shooter on the (W) side of the picket fence/inside the parking lot. A possible shooter on the East side of the picket fence, shooting from an elevated position atop a dirt mound, throws ALL the previous LOS measurements/shot angles from the parking lot side of the fence into a cocked hat.
