The thing I find fascinating about these assassinations and what is so scary about them is the link between them all. Kennedy, King, Kennedy, Lennon and Reagan - all crazy lone gunman and no real trial. I really had not thought to link Lennon and Reagan to the Kennedy/King assassination until you look at the MO and then ask that very question. Who gains?
I think that it is possible to link rogue elements of the CIA and FBI to each one of them. Ike warned of the military/industrial complex. He seems to have been dead on.