Revealing mistake: The movie is set in the USA, however, when the US Coast Guard boat ends the search for the husband's body and returns to the dock, Ashley sits on a gray bin with the words "City of Langley" on the side. Those shots were filmed in Langley, British Columbia, Canada.
Revealing mistake: When Nick Parsons /Jonathan Devereaux knocks Libby out, if you look carefully before he puts her in the casket you can see he's holding a dummy/doll from the wide angle. (01:23:53)
Revealing mistake: When Libby goes to the house to kill her husband with the gun she checks the bullets. You can see the firing pin is drilled out, rendering the gun inoperable.
Other mistake: When Nick is confronted with the evidence against him at the end, Tommy Lee Jones says they found a shovel and dirt in Nick's car trunk. But Nick didn't bury her, he locked her in a concrete tomb.
Suggested correction: They were saying this was how they were gonna frame him, not what he actually just did to her.
Character mistake: The Fifth Amendment Double Jeopardy Clause does not apply. Libby could be convicted of 1st Degree murder when she gets out and pursues Nick. It doesn't really matter to the plot, however, because it was what Libby believed to be true and motivated her. Further, she ends up shooting Nick in self-defense. So it's all good.
