Actually, I've seen demonstrations where there is no need for a magic bullet that changes directions. When you take into account the fact that JFK was leaning forward and Connelly was turned to the side, the path of the bullet is quite straight. The situation doesn't demand a second shooter.It's always been pretty silly that anyone would believe in a magic bullet that changes directions, not being re-directed by any bones. Arlen Specter was always a POS.
It's always been a conspiracy, whether it was the CIA (most likely), the Soviets, the Cubans, or the Mafia.