It’s documented that he had regular contact with the CIA and that the CIA stonewalled congress on providing information. The CIA even appointed one of Oswald’s handlers as a CIA liaison to congress, while covering up the connection. Congress had specifically requested the liaison have no connection to the case.
https://nymag.com/intelligencer/article/jfk-assassination-documents-national-archives.html
Let’s talk about ads in Google Chrome… proceeds to describe how the fediverse works.