Corrected entry: When the professor gets killed, a kid is shown trying to drink out of the water fountain, but the water is turned off. Gideon figures out that there will be no water to the sprinklers, so a fire is soon going to be set. In real life, fire sprinklers are not connected to the main water supply. Sprinklers are on a separate pump.
Corrected entry: Previous episodes of the series have established that the series takes place in present day, well into the 2000's. The models of cell phones and cars used, references to the 9/11 attacks, etc. In this episode, both Jacob and Sarah Jean are shown to be executed in the electric chair. The problem is; Florida has not used the electric chair for executions since July 8, 1999. Ever since, the state has used lethal injection for capital punishment.Twotall
Corrected entry: We are told that an anlysis of the DNA from the hair sample held in the evidence bag shows it came from Rebecca Bryant, the first victim of the serial killer they are hunting. Later we see a clear shot of the hair - it is a lock of hair, cleanly cut off and tied with a ribbon. There are no roots, which are the only parts of the hair which contain DNA - hair shafts do not. They would not be able to harvest DNA from this hair sample.