The best evidence is that is was a one-man job-- Oswald did it by himself and for his own reasons. The government paid for a blue-ribbon panel to research this question and that is what they concluded. As your question suggests, other conspiracy theories exist .
He was a journalist and an author.
actually John F Kennedys son, Patrick, died a few years back. i think
he fought in the navy.
Rose Fitzgerald.
Richard Nixon
Brookline, Massachusetts
Macaroni
1917-1963
Jacqueline Lee Bouvier was John F. Kennedy's first lady.
Jacqueline Bouvier
He was a Roman Catholic.
William Greer