The first time Harker is at her house it shows the front door top lock chain locked. Moments later there is a tense moment where she locks the same chain lock.
When Harker and Carter arrive at the Camera Family Farm, it is dark and stormy out. However, when they are inside the barn opening the box with Carrie Anne's doll inside of it, there is sunlight streaming through the windows.
When Lee first visits her mother, she observes a cockroach emerge from underneath the closed basement door. Stacks of canned food are seen on the floor beside the refrigerator near the doorway. However, in the next shot when Lee approaches the door, the cans are no longer there.
In the opening scene, and once later in the movie, a Common Loon call can be heard multiple times. While commonly used in films for its spooky sound, it is revealingly out of place here as it is winter - loons fly south for winter. These calls in the film are known as loon 'wails' and are used to communicate between pairs - if there is snow, there are not loons in the area, as these are breeding season calls.
Despite the movie being set in the 1990s, the theme for "The Price is Right" that can be heard on the TV is the version that has been used since 2007.
Earlier in the film Harker is told that the killer doesn't leave behind any trace at crime scenes yet later on in the film the killer is clearly doing things (parking at crime scenes, entering homes) that would easily leave trace evidence.
Numerous scenes include vehicles with plates depicting lavender mountains with a Douglas Fir tree in the middle. This design was not released until 1988, though the film is set in 1970s Oregon.
When agents Harker and Carter uncover the doll buried beneath the floorboards in the barn, the number of lightning strikes in a row that were shown is unheard of for western Oregon in the winter, and most certainly was added for dramatic effect. While storms are common in western Oregon in the winter, lightning and thunder are not.