The one starring Kevin Costner was pretty good if you ask me. It's been 50 years of conspiracy theorists vs debunkers though. The government's stance on it forever will be that it was a crazy lone gunman regardless of if everyone but the government believes it. The government's stance is law- not necessarily fact.

There is a short video you can find that shows the secret service agents being told (through their motioning by the supervisor) to stand down. (Google it) They were removed from the presidential limosine just prior to the motorcade entering DealeyPlaza.

The agents years later would say this was common place for a shift change.There was no shift change that day, nor has there ever been before.

This video (although not a movie per see) speaks volumes as the involvement in the inner circle of the Kennedy government in the murder of the US head of state.

There are over 300 JFK assassination conspiracy theories each about as stupid as the last. Oliver Stone made a movie about one of the dumber ones which went on to misinform an entire generation of ignorant morons and made Stone a lot of money.

JFK

There's a lot of talk about a conspiracy. I don't know if it really was a conspiracy but it's still fascinating to me, especially the one involving Lyndon Johnson (who had a lot to gain from Kennedy's death).