cast
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Keira Knightley
Loretta McLaughlin
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Carrie Coon
Jean Cole
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Chris Cooper
Jack Maclaine
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Alessandro Nivola
Detective Conley
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Rory Cochrane
Detective Deline
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David Dastmalchian
Albert DeSalvo
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Peter Gerety
Eddie Corsetti
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Robert John Burke
Eddie Holland
- Ryan Winkles Daniel Marsh
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Morgan Spector
James McLaughlin
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Michael Malvesti
Detective Donovan
- Aurora McLaughlin Maggie
- Liam Anderson Tommy
- Antonio Volpicelli Patrick
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Nancy E. Carroll
Mary McDermott
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Therese Plaehn
Kelly
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Stephen Thorne
Frank Cole
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Greg Vrotsos
George Nassar
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Ian Lyons
Gordon Nielson
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Christian Mallen
Paul Dempsey
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Pat Fitz
The Killer
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Pamela Jayne Morgan
Anne Samans
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Robert C. Kirk
Arthur
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Charlie Thurston
Fritz
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Kate Middleton
Phyllis
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Ivan Martin
Stanley
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Kate Avallone
Lifestyle Editor
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Tamara Hickey
Ellie
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Luke Kirby
F. Lee Bailey
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Thomas Kee
Richard DeSalvo
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Kyra Weeks
Emmie
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John Lee Ames
Harrison
- Richard O'Rourke Old Addict
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James Ciccone
Detective Linski
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Bill Camp
Commissioner McNamara
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Jimmy LeBlanc
Officer Dougan
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Gary Galone
Belmont Detective
- David Conley Old Desk Cop
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Josh Drennen
Sergeant Burke
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Brian Faherty
Officer Sullivan
- Caroline Nesbit Jane Sullivan
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Michele Proude
Anna Slesers
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Grace Aiello Antczak
Claire
- Sheriden Thomas Nina Nichols
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Rosemary Howard
Helen Blake
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Kris Sidberry
Sophie Clark
- Sissy O'Hara Ida Irga
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Kate Lynch
Beverly Samans
- Corinne Ognibene Strangler Victim
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Erin Rose
Assault Victim
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Caitlin Zerra Rose
Young Woman
- Laura Darrell Karen
- Lydia Harrell Ms. Thompson
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Paula Plum
Mrs. Quinn
- Jake Casper College Kid
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Danny Connelly
Building Super
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Frank Ridley
Ida's Super
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Bill Mootos
Dr. Grayson
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Jennifer Lafleur
Nurse Patty
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Danielle Perry
Nurse Deb McNulty
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Moira Driscoll
Psych. Orderly
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Victor Warren
Director
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Bill Thorpe
Brawny Detective
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Mike Bash
Inmate
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Marissa Carpio
Production Assistant
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James Wilcox
Police Examiner
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Michael Tow
JC Kim
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Jonathan Fielding
Herald Reporter
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Owen Burke
Officer Shanley
- Al Conti Boston PD Detective (uncredited)