Oscar-winning director Oliver Stone is to testify on latest JFK assassination files
                        
                                                    
                                
                                
                                
                                
                                
                                    The director, whose 1991 Oscar-winning film 'JFK' has been derided by historians for suggesting the CIA had a role in the killing of John F Kennedy, will speak to task force today aiming "to get to the bottom of this mystery."                                
                            
                        
                        
                                                    
                        
                        
    
    
        
            
            
        
        
    
                        
                            The director, whose 1991 Oscar-winning film 'JFK' has been derided by historians for suggesting the CIA had a role in the killing of John F Kennedy, will speak to task force today aiming "to get to the bottom of this mystery."