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True Detective - Season 2 - Vince Vaughn & Michelle Forbes in talks to Star and Plot Details Revealed

Vince Vaughn is in talks to play the central antagonist (not necessarily the villain or murderer – this is a mystery-based series after all) on the second season of HBO's “True Detective,” while Elisabeth Moss (“Mad Men”) is being eyed for the female lead and Michelle Forbes (“The Killing”) is in contention for a key role on the show, TheWrap has learned.

According to a breakdown obtained by TheWrap, the second season of “True Detective” will follow the death of Ben Caspar, the corrupt city manager of a fictional California city who's found brutally murdered amid a potentially groundbreaking transportation deal that would forever change freeway gridlock in the state. Three law enforcement officers from different cities and branches of the government are tasked with finding out who did it. They soon discover their investigation has much broader and darker implications than they initially thought.

Caspar's 52-year-old corpse is found on a lonely stretch of Pacific Coast Highway near Big Sur — his eye burned out, genitals cut off and satanic symbols etched on his chest. It turns out he had a penchant for rough sex and may have been involved in the occult.

Vaughn is in talks to play Frank Semyon, a former thug-turned-businessman who's working with a local mayor and his political cohorts to spearhead the construction of a high-speed railway system that links Southern California to Northern California in order to reap financial gains from federal grants and land purchases.

Moss, who recently played a small-town cop in the similarly themed, “Top of the Lake,” is being eyed to play Ani Bezzerides, a tough, no-nonsense Monterey sheriff whose troubled upbringing has driven her to gambling and alcohol. She reports to Sheriff James O'Neil and Deputy Sheriff Marla Simenon, and her partner, Elvis Ilinca, may have a crush on her. Ani also has both a hippie-type father who was absent when she was growing up, as well as a younger sister who isn't afraid to show off her body. She's also looking into the disappearance of a former classmate's sister.

Farrell is nearing a deal to play Ray Velcoro, who has been damaged by years of turmoil in both his personal and professional lives. A barely functioning coke-head with anger issues, he's on Frank's payroll and is battling his ex-wife for custody of their only son, Chad.

Kitsch is angling for the role of Paul Woodrugh, a handsome, 28-year-old military veteran who has seen his own share of violence and destruction. He's a motorcycle California Highway Patrol officer who's put on leave after soliciting oral sex from a beautiful girl he pulls over for drunk driving. He reports to Commander Floyd Heschmeyer and has a Latino girlfriend he breaks up with when he's assigned to the Caspar investigation.

Forbes, who starred on the first season of “The Killing,” has been rumored for a part on “True Detective,” and it's possible she could play either Farrell's ex-wife (a survivor of sexual assault) or Vaughn's charming but mercurial wife.

TheWrap previously reported that the second season of “True Detective” would feature three leads — two men and one woman — while series creator Nic Pizzolatto has said there will be four leads. While the three investigators are clearly the leads, it's understandable why Pizzolatto often referred to the season's primary antagonist as a fourth lead — he was writing the role with movie star Vaughn in mind, which explains the discrepancy in semantics.