The Divine Tragedies (2015) on Netflix

Plot summary

Charles Brubaker and his half-brother Thomas Lo Bianco consider themselves to be of superior intelligence, unlike the dimwitted masses around them. Together the two concoct a deadly game meant to test their minds against those masses, and the game is also meant to fulfill devious fantasies they share. Murder is where the game leads. The tale is based loosely on the Leopold and Loeb murder case. Carrying the plan out puts a strain on the bond between the two brothers, and problems arise for the pair. Detective Homer Gaul, a policeman with a very special gift, picks up their trail.