Who is the younger detective in the movie?

In the context of the movie "Gattaca," the younger detective is Vincent's brother, Anton. He plays a significant role in the film, particularly in the interactions with Vincent, as their relationship is deeply influenced by the genetic predestination theme central to the story. Anton is a genetically superior individual, and his youth is emphasized during pivotal scenes, including a tense confrontation with Vincent, which reflects their differing life paths and the societal emphasis on genetic engineering.

Vincent, while the main character, has a different narrative arc focused on overcoming his supposed genetic limitations, which differentiates him from Anton, who is portrayed as the more conventionally successful sibling within the genetic hierarchy of their society. Thus, identifying Anton as the younger detective aligns with the film's exploration of family dynamics and the implications of genetic manipulation.