Double Edged Crime
Crimen de doble filo (original)
Andrés, son of a famous pianist, discovers the corpse of a tuner killed in his shop, located in the basement of his house. Then a suspect leaves, but in the fear of possible reprisals he doesn't tell anything to the police, only to his wife Laura. From that moment on, Andrés feels threatened and persecuted.
Starring Susana Campos, Carlos Estrada, José María Prada, Paul Eslheman, Alfonso Rojas, José Marco, Emilio Rodríguez
Watch "Double Edged Crime" on FlixOlè released in 1965. It's a crime and drama movie, and has a rating of 6.6 out of 10 from Imdb which is usually fine for this kind of movie.