This story was filmed again as Compulsion (1959) and Swoon (1992).
Ellen Kuras' gorgeous black-and-white cinematography does much to enhance Kalin's expressionistic style, which deliberately distances itself from the more straightforward, psychological emphasis of other films about this infamous pair (Compulsion, Hitchcock's Rope).
Rope located the roots of fascism in Nietzschean discourse.
If you come away wanting to see more of the murderous duo, you can add Compulsion (1959, Richard Fleischer) and Rope (1948, Alfred Hitchcock) to your Netflix queue; the latter was inspired by the pair's exploits.
The case has been made into two previous movies - Alfred Hitchcock's " Rope " (1948) and Richard Fleisher's "Compulsion" (1959), but both to one degree or another played down the topic of homosexuality.