The file image of the victim is not that of an SS officer, as can be seen from his cap insignia and collar patches - it is, in fact, a portrait of Generalleutnant (Lieutenant General) Alfred Gause during his tenure as a general staff officer in the German Africa campaign.
There is some footage from Buenos Aires but the places where the characters are don't look like Buenos Aires at all. Buenos Aires is not a tropical city, it has no beaches or waterfalls, and if music is heard in the streets it will not be like the one shown. Only the song "Gracias a la Vida" by Mercedes Sosa has something to do with Argentina. And 60% of Argentinians are of Italian descent, so it is much more likely to find Italian surnames than Spanish ones.
In Buenos Aires there are no waterfalls pools and no wild boars. Also there a no cars like the inspector's, you could only find such old car in an exhibition. The initial images were the only ones truly from Buenos Aires.
The proposed biography of the victim does not hold up to historical scrutiny. If Haupt was 90 at the time the episode is set (2013), that would mean he was born around 1923, which would mean that he was only 16 at the outbreak of the war. However, it is claimed that he was a Sturmbannführer (= Major of the SS), and Majdanek Concentration Camp only went in operation as an extermination camp in late 1942. In short, he could only have volunteered around 1940-41 and would have had to rise to the rank of Major within four years - which is beyond unlikely even with the amount of brevet promotions doled out at the later stages of the war.