Bush was not head of CIA in 1963.
A 1963 memo from J Edgar Hoover says the FBI informed HW Bush a member of the CIA about the reaction of the Cuban community to the Bay of Pigs. Bush was likely working for the CIA starting in 1960-1961 using his oil business to cover his clandestine activities.
There is a famous picture of Bush Senior putting Him right in the thick of the aftermath of the assassination.
Once in you are never out just like the Mafia, which doesn't exit.
“Bush was not head of CIA in 1963.”
He wasn’t head.
But IIRC, he was IN the CIA then, and he was IN DALLAS that day.
Doesn’t mean he wasn’t working for them.