Continuity mistake: Throughout the scene where the SUV crashes in the woods, Sadie is wearing large dangling earrings. In one quick shot where she is seen sitting in the back of the vehicle after the crash, her left earring is missing. It reappears in the next shot.
Plot hole: When the 3 criminals are in the kitchen with Mary's parents, you see a picture of Mary on the fridge. There's no way none of them didn't see it considering they were in the kitchen for an extended period of time.
Trivia: In the original film, Mari died after being shot in the lake. For this remake, she lived, turning her parents' struggle from a fight for revenge to a fight for survival to give the film a "sense of urgency"