It was previously rumoured that Rachel McAdams and Elisabeth Moss were competing for the role of a tough California sheriff, whose dark past has driven her to gambling and alcohol addictions, reported The Wrap.
However, seven further actresses have been invited back to read for the role.
Although McAdams and Moss are reportedly still in contention, 'Sin City' star Dawson is thought to be the new front-runner.
Biel, Malin Akerman and Jaimie Alexander have been touted as strong candidates.
Meanwhile, Brit Marling ('Another Earth'), Oona Chaplin ('Game of Thrones') and Kelly Reilly ('Sherlock Holmes') are considered outsiders for the part.
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The second season, again written by Nic Pizzolatto, will reportedly pick up with the brutal murder of a corrupt California city manager, whose body is found on the eve of a potentially groundbreaking transportation deal.
Three law enforcement officials from different cities are tasked with solving the case.
Unlike the first season, which was directed entirely by Cary Fukunaga, the second season is likely to use several directors, with rumoured names including Justin Lin and William Friedkin.
The second season of 'True Detective' is due to begin production this month.