The
first shot was just after the limo turned onto Elm but before it reached the road sign. However, the tree branch in Oswald's line of sight deflected it (across the plaza), leaving Kennedy and
Connally clearly startled. The second shot hit Kennedy in the upper back-lower neck, and then the third shot struck him in the back of the head, but at an odd angle because the limo was still rounding Elm's gentle curve. Standing next to Oswald's perch (which is now enclosed with glass), the shots all line up perfectly.
There were no other shooters, and even if there had been one on the grassy knoll area (as conspiracy theorists claim), the bullet would have struck Kennedy in the SIDE of the head and downward because of the knoll's elevation, Elm's curve, and the acceleration of the limo.
And there was no possible way for anyone to be shooting up at him from the storm drains. Period.
I never bought into the storm drains or umbrella-dart theories but it isn't enough to analyze the shots, one must look at the mangled forensic evidence as well. In addition any detailed analysis of Oswald will bring up too many inconsistencies about his movements and whereabouts 1959-1963. Ruby's background is also very suspicious. I see the mob as deeply involved too.
Oslwald was capable of firing a shot but his movements immediately after the shooting are bizarre.