Continuity mistake: When Sam finds the list of "Guitar Hero" receipts in Corporal Valdivia's house, he flips the top page to the bottom of the pile, and in the next shot he has the following page in his hand, without having moved. (00:06:25)
Continuity mistake: At the beginning a person is shot in the back of the head during a surveillance. The camera is filming a man and a woman on a boat at a marina. The feed is being played in real-time on the laptop. The killer starts to gather all the recording equipment, including dismounting the camera off the stand. The killer called the man on the boat to say "it's done". The computer screen shows the man on the boat leaving the boat even after the camera was dismounted.
