Oswald killed JFK but I very much doubt that we know the whole story.
Musings of a Cigarette Smoking Man
The writers must have had a blast with this one. It bordered on satire.
Oswald did it .....alone.
I’ve read it all or almost all...Conspiracy theories raise more questions than they answer and raise more questions than “Oswald did it alone” does. Much, much....much more likely that Oswald did it alone.
There will always be a certain amount of “reasonable”, or “not so reasonable”, doubt.