The Douglass book is “thin gruel”.
Proof the CIA was involved in the assassination was provided by the son of the guy in charge of logistics—who names names:
https://www.amazon.com/Bond-Secrecy-Watergate-Conspirator-Howard/dp/1936296837
Here is the list of named CIA co-conspirators:
E. Howard Hunt
David Atlee Phillips
Cord Meyer Jr. (JFK had an affair with his wife btw—this was personal)
William Harvey
Frank Sturgis
JFK was insane to have taken a CIA man’s wife. That Cord Meyer had a REALLY bad decade: (from Wikipedia)
On 18 December 1956, Meyer’s nine-year-old son, Michael, was hit by a car and killed. Meyer and his wife Mary divorced in 1958. On 12 October 1964, his former wife Mary was shot dead by an unknown assailant alongside the Chesapeake and Ohio Canal.[10] Her sister and brother-in-law Benjamin C. Bradlee, [...] caught [co-worker/friend] Angleton breaking into Pinchot’s residence.[7] Angleton apparently was looking for Mary Meyer’s diary that allegedly contained details of a love affair with John F. Kennedy[...].[7][11]
And gee, damned if those names don’t pop up again 10 years later .