There are many theories about who really killed Kennedy, and whether Oswald killed Kennedy by himself or with other shooters. IE, the Mafia, Castro, the Soviets, the CIA, Johnson, Hoover and the FBI, the Military-Industrial Complex, the Grassy Knoll, a "Magic Bullet" making the current explanation flawed, etc., etc. And frankly, all these theories ignore ballistics, the positions of Kennedy and Connolly (they were not on level; Connolly's seat was lower than Kennedy's and further in), much evidence, and so on.
But what if by some stroke of fate in an AH it really was a Conspiracy (any one of them) and what if that was discovered either by the Warren Commission or later on?