Wolfen [1981] Albert Finney

In New York, when the influent millionaire Christopher van der Veer, his wife Pauline van der Veer and their bodyguard are mysteriously murdered at the Battery Park, Detective Dewey Wilson is summoned by his chief Warren. Dewey had a drinking problem in the past, but now he is recovered, and is assigned to the case to work with the political specialist Rebecca Neff. He meets with the coroner Whittington that finds the case challenging. When a homeless man is found murdered in Bronx, Whittington finds the same Modus Operandi and a common animal fur of the Battery Park case. The expert in animals Ferguson identifies the fur as belonging to a wolf, and the troublemaker Indian Eddie Holt becomes the prime suspect for Dewey.