Film alleges that Agent George Hickey accidentally shot Kennedy in the head
It is based on the work of veteran Australian police detective who has spent four years investigating the assassination
The government then covered up the Secret Service role, it is claimed, to save the agency from embarrassment

Many conspiracy theorists unhappy with the official account of the assassination of John F. Kennedy have pointed to evidence they believe shows that the president was shot twice, from different directions.

Now a new documentary has come up with a new twist on the conspiracy theory, claiming that a Secret Service agent was the man who fired that shot... by accident.

JFK: The Smoking Gun claims that George Hickey, a Secret Service man riding in the car behind Kennedy, accidentally fired his weapon on November 22, 1963.

What really happened? Secret Service agent Clint Hill stands on the rear bumper of JFK's car as Jackie bends over her husband moments after he was shot as they drove through Dallas, Texas

It alleges that a cover-up was then carried out to save the blushes of the agency whose main role is to protect serving and former U.S. leaders - leaving the many loose ends that have long raised suspicions.

It is said that as much as 75 per cent of the American public do not believe the official account of the Kennedy assassination.