Factual error: In the chase scene where Lou is running after the derelict, they pass a number of vehicles parked and driving on the streets. All of them are correct period vehicles for the late 1950s, except for a white semi truck which is from at least the mid 1990s. The grille and headlights on the truck are the giveaway. (01:23:20)

The Killer Inside Me (2010)
1 mistake - chronological order
Directed by: Michael Winterbottom
Starring: Jessica Alba, Kate Hudson, Casey Affleck, Ned Beatty
Billy Boy Walker: A weed is a plant out of place. I find a hollyhock in my cornfield, and it's a weed. I find it in my yard, and it's a flower. You're in my yard.
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Answer: They most certainly should have. Even a small amount would be detectable. This seems to be a "plot hole".
raywest