In the briefing about the case, agent Hanna says that the teachers' and students' phones are turned off and therefore cannot be tracked. But in the kidnapping scene, the students and teacher are told several times by the kidnappers to leave their phones behind, which they do.
Several scenes show vehicles with a Pennsylvania license plate on the front bumper. Pennsylvania vehicles are not required to have front license plates.
At the first location where the kids are believed to be held, Remy and the team are accompanied by a large SWAT team. For some reason, when they go to a second, more dangerous location, they no longer have SWAT with them.