It was a movie around 60s to 80s. It was long time ago I watched some parts of the movie. The things that I remember was about a prisoner who transferred by a guard and an aggressive and well-trained dog. In a forest area, the prisoner escaped by hitting the dog and killing the owner. The dog started to find prisoner by sniffing the path to take revenge. At the end in the city, the dog find the prisoner in the airport and started to attack him and suddenly the dog shot by sniper.