Dan Rather described the Zapruder Film he saw the weekend after the assassination. Rather described seeing the JFK Limo turning onto Elm St. Sitzman said the same thing. She said from that Perch they could see the JFK Limo coming down Houston St and turning onto Elm St. This is Proof that the Current Zapruder Film has been altered.
"Bullet passing through JFK...." ? Are you talking about a bullet passing through JFK fired from the Front? Humes was unable to even put a finger into that BACK Wound further than his knuckle.
Not sure where you are getting Knott Lab Forensic SCIENCE tracking a, "....separate bullet striking JBC from out of nowhere". Knott Lab Forensic SCIENCE found the SBT, "Is Impossible". Please try and stay Factual.