December 24, 1975, and the film is dedicated to his memory. Scorsese, a long-time admirer of Herrmann, had particularly wanted him to compose the score; Herrmann was his "first and only choice". Scorsese considered Herrmann's score of great importance to the success of the film: "It supplied the psychological basis throughout." The album The Silver Tongued Devil and I from Kris Kristofferson was used in the film, following Alice Doesn't Live Here Anymore (1974) where Kristofferson played a supporting role. Controversies Casting of Jodie Foster Some critics showed concern over 12-year-old Foster's presence during the climactic shoot-out. Foster said that she was present during the setup and staging of the special effects used during the scene; the entire process was explained and demonstrated for her, step by step. Moreover, Foster said, she was fascinated and entertained by the behind-the-scenes preparation that went into the scene. In addition, before being given the part, Foster was subjected to psychological testing, attending sessions with a UCLA psychiatrist, to ensure that she would not be emotionally scarred by her role, in accordance with California Labor Board requirements monitoring children's welfare on film sets. Additional concerns surrounding Foster's age focus on the role she played as Iris, a prostitute. Years later, she confessed how uncomfortable the treatment of her character was on set. Scorsese did not know how to approach different scenes with the actress. The director relied on Robert De Niro to deliver his directions to the young actress. Foster often expressed how De Niro, in that moment, became a mentor to her, stating that her acting career was highly influenced by the actor's advice during the filming of Taxi Driver. John Hinckley Jr. Taxi Driver formed part of the delusional fantasy of John Hinckley Jr. that triggered his attempted assassination of President Ronald Reagan in 1981, an act for which he was found not guilty by reason of insanity. Hinckley stated that his actions were an attempt to impress Foster, on whom Hinckley was fixated, by mimicking Travis's mohawked appearance at the Palantine rally. His attorney concluded his defense by playing the movie for the jury. When Scorsese heard about Hinckley's motivation behind his assassination attempt, he briefly thought about quitting film-making as the association brought a negative perception of the film. MPAA rating The climactic shoot-out was considered intensely graphic by some critics, who even considered giving the film an X rating.