It was Johnson, FBI, CIA, Mossad and the MOB. They all colluded and had reasons they needed JFK gone. Without all these players it would not have happened. Also the SS was in on it, changing the route, slowing the car down in the shoot zone. Johnson's sheriff was the lead car! J. Edgar (Mary) Hoover and his boyfriend were in Cuba at the MOB ran horse race track were he was paid off with winnings and didn't return for 2 weeks after the hit!
Nino's corner had Carter's grandson has this recording made by his uncle on his show.