When Caleigh finds the photo of the young boy in the football uniform, she is shown holding it by the upper left corner with her bare hand. However, when Natalie is dusting the photo for fingerprints, there is no fingerprint indicated in that same corner.
Alexx said that the knife went into the victim's carotid artery paralyzing him. The artery has nothing to do with nerves. That would not paralyze him. He would have had to be stabbed in the vertebrae somewhere to paralyze him.