1. Oswald acted alone.
2. Certain CIA figures misguidedly thinking they were protecting the free world had Kennedy assassinated, using Oswald as a patsy and likely with MKULTRA conditioning; in this case, Ruby could have acted on behalf of Carlos Marcello, at the request of the CIA. Most likely CIA figures to be involved are led by Allen Dulles, followed by Richard Helms, James Angleton, and a few others. LBJ slightly involved? Possibly, not likely. J. Edgar Hoover and Warren Commission outside of Dulles not involved.
It's pretty remarkable how strong the cases for each of these scenarios are. It's also pretty remarkable how many basic issues have not been resolved.
2. Certain CIA figures misguidedly thinking they were protecting the free world had Kennedy assassinated, using Oswald as a patsy and likely with MKULTRA conditioning; in this case, Ruby could have acted on behalf of Carlos Marcello, at the request of the CIA. Most likely CIA figures to be involved are led by Allen Dulles, followed by Richard Helms, James Angleton, and a few others. LBJ slightly involved? Possibly, not likely. J. Edgar Hoover and Warren Commission outside of Dulles not involved.
It's pretty remarkable how strong the cases for each of these scenarios are. It's also pretty remarkable how many basic issues have not been resolved.