Boston Police Detective Shannon Mullins is a hot-headed, boorish investigator who partners with Ashburn. She navigates personal conflicts involving her brother Jason, moves her family to a motel, removes a knife from Ashburn's leg, and fights off Julian to save them. She later uncovers Larkin's true identity and receives a police commendation.
Initial professional friction due to contrasting investigative methods.
Craig's interaction ends in his death.
Mullins discovers Adam's true identity during captivity.
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