Which FBI agent leads the Bay Harbor Butcher case in Dexter season 2?

Frank Lundy leads the Bay Harbor Butcher case in Dexter season 2. Lundy is an FBI special agent recruited to Miami to head the task force investigating the bodies discovered in Dexter Morgan’s underwater dumping ground.

Played by Keith Carradine, Lundy is portrayed as an experienced federal investigator with a reputation for pursuing difficult serial-killer cases. His calm, analytical approach makes him one of the few investigators capable of narrowing the suspect pool and recognizing patterns that Miami Metro initially misses.

The investigation also drives major personal and professional developments. Lundy works with Miami Metro detectives, including Debra Morgan, and the two develop a romantic relationship during the season. His pursuit eventually comes dangerously close to exposing Dexter as the real Bay Harbor Butcher.

The answer is not James Doakes, Mike Anderson, or Stan Liddy. Doakes becomes the person authorities ultimately blame, while Anderson and Liddy are investigators associated with later seasons and cases.