Personality and Appearance
Detective Hahn is a tall black man with major physical strength. He has a padlock-shaped facial hair and usually wears a suit. He is John's friend and pretends to be on his side even after John tried to beat him up but it turns out that he has been secretly coveting his wife, Alex.
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After finding out that he is the killer, John goes to him to confess but he tries to convince him that he is a good person and wouldn't do such thing. Then, John tells him that he knows he wants Alex and stabs him two times in the stomach area. 
- To John Lowe: "You don't deserve Alex."
- This character marks Richard T. Jones' first appearance on American Horror Story.