This testimony... along with the "hurry it up" replace and repair of Kennedy's limo... which in any other investigation would be considered tampering of evidence... seems to confirm a conspiracy from among the highest officials of government...
Maybe think things through before finding sinister motive behind every blade of grass. The limo needed immediate upgrading for the protection of the president. Note below that both the FBI & SS took photos and searched for evidence before the limo was throughly cleaned.
SS-100-X
https://en.m.wikipedia.org/wiki/SS-100-XEXCERPT
Later that afternoon at 3.30 pm CST the limousine was taken to Love Field and boarded on a C-130 and flown to Andrews Air Force Base, Washington DC, landing at 8 pm EST. After arrival at Andrews AFB, the limo was delivered to the White House garage.
The Secret Service and later the FBI took photos of the limo's interior and searched it for evidence before it was thoroughly cleaned and valeted.
Post-assassination
In late December 1963, the car was sent back to Hess & Eisenhardt to be modified further, and was rebuilt from the ground up. For protection, the Lincoln received titanium armor plating, bullet-resistant glass and a bulletproof permanent roof. Solid aluminium rims were also fitted inside the tires to make them flat-proof. It remained in service for an additional eight years, logging 50,000 miles on the ground and over one million miles being flown to and from its destinations. The vehicle was equipped with Presidential lap robes and mouton carpeting and a complete communications system including radio patch to the White House. It was replaced in 1967 and remained in service doing less important duties until 1978, when it was retired to the Henry Ford Museum.