Clint Hill is a lying piece of scum. His foot never hit the road until JFK was dead anyone can see that on the Muchmore film. I always thought Ruby could have planted it since he was at Parkland according to Seth Kantor and I 100% believe him. Seems the Secret Service did several illegal things that day including stealing JFK's body from Parkland.
SSA Hill was on the tarmac & was level with the front left wheel of Queen Mary when SSA Hickey fired his say 4th shot at Z312 (hitting JFK in the head).
That means that SSA Hill was possibly hitting the road at say Z304 (ie a half second earlier) when SSA Hickey fired his first shot of his accidental auto burst of his AR15.
And SSA Hill did not hear the auto burst, he heard 2 shots (ie Oswald's 2 shots at pseudo Z103 & at Z218).
It is possible that the slug from Z218 could have bounced out of Connally's thigh to any point in the limo (eg onto the back seat)(eg after bouncing offa the back of the front seat).
Hence Landis is probly telling the truth.
Lattimer's 1994 tests showed that it was not possible for Connally's lapel to flip at Z224 unless the slug from Z218 had firstly passed thru JFK.
Lattimer showed that the spray from the outshoot was not powerfull unless the slug had started to tumble before entry into Connally.
Hence Lattimer proved the SBT.