Phil Willis put a time stamp on the first shot by clicking the shutter on his camera when the sound
of that shot startled him.
A frontal throat shot doesn't need to go through the windshield.
There is an unobstructed line of sight and bullet path from the top of the picket fence to JFK's throat.
Which if memory serves, is where the HSCA acoustical study and many DP witnesses said at least
one shot originated from.