Miscellaneous: The opening subtitle says that the Deerfields live in "Munro, Tennessee", but the address on the side of Hank's truck says "Munroe, Tennessee".
Factual errors: Hank, a truck driver, reads an email discussing a "weigh bill." The proper term is "waybill."
Continuity: If you follow closely Det. Emily Sanders' car plate, one scene shows the plate, another does not and so on.
Revealing mistakes: The envelope holding the folded flag would have to much larger than the prop used in the film.
Revealing mistakes: After the crime scene is handed to the army, Hank Deerfield is seen rolling out of bed, a shot of his feet landing on the carpet shows pressure imprints of socks on his ankles indicating he had just removed socks, which as he just rolled out of bed wouldn't be the case.
Continuity: In the scene where Hank Deerfield is trying to access his son's financial records via his laptop, he is talking to his wife on the phone. When the camera is on him, he is holding the handset to his ear but when the camera is on the laptop, the phone is visible to the right of the laptop and the handset is on-hook. The logo of a dial-up ISP is displayed on the laptop as it's downloading e-mail. If the laptop is connected to the ISP, he couldn't be using the phone line to make a voice call.
Revealing mistakes: The first video downloaded from the camera phone shows elaborate well-focused telephoto work, as well as a high crane shot of the native people. This type of video could not be shot by the tiny cell phone or by person less than about fifteen feet tall.