| Cast overview, first billed only: | |||
| Sam Worthington | ... | Mike Souder | |
| Jeffrey Dean Morgan | ... | Brian Heigh | |
| Jessica Chastain | ... | Pam Stall | |
| Chloë Grace Moretz | ... | Little Ann Sliger | |
| Jason Clarke | ... | Rule | |
| Annabeth Gish | ... | Gwen Heigh | |
| Sheryl Lee | ... | Lucie Sliger | |
| Stephen Graham | ... | Rhino | |
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Corie Berkemeyer | ... | Shauna Kittredge |
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Trenton Perez | ... | White Kid (as Trenton Ryan Perez) |
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Maureen Brennan | ... | Mrs. Kittredge (as Maureen A. Brennan) |
| Tony Bentley | ... | Captain Bender | |
| Becky Fly | ... | Neighbor | |
| James Landry Hébert | ... | Eugene (as James Hébert) | |
| John Neisler | ... | DPS Officer | |
Souder, a homicide detective in a small Texan town, and his partner, transplanted New York City cop Detective Heigh, track a sadistic serial killer dumping his victims' mutilated bodies in a nearby marsh locals call 'The Killing Fields'. Though the swampland crime scenes are outside their jurisdiction, Detective Heigh is unable to turn his back on solving the gruesome murders. Despite his partner's warnings, he sets out to investigate the crimes. Before long, the killer changes the game and begins hunting the detectives, teasing them with possible clues at the crime scenes while always remaining one step ahead. When familiar local girl Ann goes missing, the detectives find themselves racing against time to catch the killer and save the young girl's life.
The movie itself is really on the verge of being really good. But it never quite reaches that top. Still it is a wonderful acted and photographed movie. The story keeps you on your toes (or the edge of your seat from time to time), though you sometimes wish there would be a clearer and easier to follow narrative. On the other hand you could argue that that is the strong point of the movie.
Being based on real events, this obviously had some high expectations to fill (read there was some notion from the real detectives, who were hoping to get new clues on happenings in that area, though I can't confirm if that is true or not). And it shouldn't matter or make a difference on what you think of the movie. Either you like it or you don't. No matter what is really going on. You can't put that kind of pressure on a low budget movie like this one.