Fear Is the Key. Poster of the 1972 movie and cover of the 1961 book, Fear is the Key
VS3
Fear is the Key
Alistair MacLean, 1961
movie vs book
Michael Tuchner, 1972

John Talbot is talking on radio to a woman and a man who is flying a plane. He hears them being machine gunned to death by another plane. Some time later, Talbot appears in a small town in Louisiana, where he starts a fight with some local police. He is arrested and faces trial, where it is revealed he is wanted for killing a policeman and robbing a bank.