At a ledge near the top after bats flew out of a hole in the rock, he jumped forward to another protruding stepping stone and made it without falling, before climbing out.Meanwhile, the position of Defense Against the Dark Arts was filled by Severus Snape.Dumbledore described the reason for the new tighter security -- he told about a former student named Tom Riddle, now known as the Dark Lord, and then warned: "dark forces attempt o penetrate this castle""s walls.Advertising posters for the film read:"Dirty Harry and the homicidal maniac.Harry""s the one with the badge.""You don""t assign him to murder cases.You just turn him loose.""Detective Harry Callahan.He doesn""t break murder cases.He smashes them."Eastwood followed up with four other fast-paced, commercially-successful, but formulaic ""Dirty Harry"" cop-thriller sequels:Magnum Force (1973)(d." He rejected his insistent boss"" idea to assist in the local investigation ("They wouldn""t want it...No, sir, I""m not prejudiced").When Gillespie was handed the phone, he was told that Virgil was their "number one homicide expert" and that his decision was final, but Gillespie was confident in his own police force: "I think we can wrap this thing up ourselves.