Experts!
This is from the article, Who killed President Kennedy?" by Rockwell Jr.
In 1992, Congress passed the President John F. Kennedy Assassination Records Collection Act. That act mandated full disclosure of all documents by 2017, 54 years after JFK was killed. The last administration promised to comply fully with that law. But under intense pressure from CIA Director Mike Pompeo, withheld, in the end, thousands of pages of CIA documents.