The Angry River (1971)

A wave of fear sweeps through the city as a shadowy figure known as "Poison Dart" targets influential individuals with lethal precision. This enigmatic assassin uses poison darts to eliminate high-profile victims, leaving authorities baffled and the public in a state of panic. As the body count rises, detectives scramble to uncover the identity of this elusive murderer, racing against time to stop the next strike. The tension mounts as they delve deeper into the dark web of connections surrounding the victims, searching for clues that could lead them to the mastermind behind the reign of terror.