Goofs

One piece of crucial evidence that could implicate Amy and be seen as very suspicious is the getaway car that she used. She bought the car from a Craigslist seller, and picked it up in person, so the seller definitely saw her face. She is found by Desi Collings at the casino and he takes her to his home, In his car, leaving hers behind at the casino. The car would eventually be towed by the tow truck company and they'd try to contact the original owner. The car originally belonged to the seller and he'd definitely remember that he sold his car to Amy, as her disappearance became a nationwide media frenzy and he'd recognize her by memory. This would lead to the authorities checking out the surveillance footage of the casino where the car was left (which they'd definitely have so as to catch cheaters) and they'd see Amy being friendly and civil with her supposed kidnapper. While the novel does have a scene showing Desi helping Amy to dispose of the car in a lake, such a scene is never shown in the film, so the car just disappears from the film without explanation. See more