DPD Motorcycle Patrolman B.J. Martin on Presidential Limo Stopping During Assassination

Cut #3 from
https://rumble.com/v6rbue0-larry-rivera-the-jfk-horsemen-part-1-of-2.html
Keven Hofeling summary:
This simply superb presentation was broadcast on The New JFK Show #27 by Dr. Jim Fetzer and Gary King on the Revere Radio Network. The detail Larry Rivera presented this information about the Motorcycle riders is remarkable, as is the audio clips provide great supporting evidence.

The Jimmy Courson story is a great capstone to the multiple strands of police officer testimony supporting (1) shots from the front; (2) the limousine slowing down or completely stopping; and (3) film alteration after the fact. In the case of Courson's account, there is no danger of this being "hearsay" evidence: he is captured on camera telling his story at the time of the 50th anniversary.