Admittedly, it's a small sample size...maybe four or five entries...but this 1952 film from Carlos Hugo Christenson is definitely the tense-ist (is that a word?), darkest and creepiest Argentinian noir that I've seen. The final twenty minutes or so will leave you pretty darn close to the edge of your seat, metaphorically if not literally, and the buildup, while on the restrained side...the first child murder occurrs offscreen...is quite disturbing, with an atmosphere of Peronist Fascism permeating the proceedings (i.e. The authoritarian school with those eerie white, surgical uniforms on the kids, the sighting of the child murderer in broad daylight and that horrible dream sequence involving merry go rounds, prison bars, dog like beasts and phallic hands with lollipops emerging from trash). So, aside from a couple story problems in either Cornell Woolrich's original or the adaptation, like the fact that the hero's PTSD radar would and should have been instantly aroused when the second victim announces that a man gave her a gift and the needless coincidence of having both victims sit in front of our hero in school, two years apart, and the fact that Nesator Zavarce's performance will not exactly make you forget Dean Stockwell (in other words, it's way over the top, even in the calm scenes) this is highly recommended. B plus.