Once Oswald became the patsy for the JFK assassination the Russians knew they had been suckered.
.......
Is your point that Oswald was framed? That there was a different shooter? (if so, based on what?)
Oswald was framed—total no brainer.
Already released JFK assassination files prove he was on the second floor of the Texas Book Depository Building at the time of the assassination.
He was getting change for a dollar to use for the coke machine at the time.
There were several witnesses—their testimony was ignored by the Warren Commission.
There were multiple shooters—at least two on the Grassy Knoll and probably one on the sixth floor of the Depository Building and another at the Dal Tex building.
The “kill shot” came from the Grassy Knoll.
The absolute proof of CIA involvement is provided in the deathbed confessions of E. Howard Hunt found here:
https://www.amazon.com/Bond-Secrecy-Watergate-Conspirator-Howard/dp/1936296837
Hunt was in charge of on-site logistics.