If you want to know if someone is "real" tell them an obvious lie. A human will recognize it for what it is immediately, a cursed will not. They may look real, but they are not. Only real eyes realize real lies.
Although he had no Identification on him this was found in his fob pocket. It is arabic for "Finished" or "Ended". It was torn out of a book called "The Rubaiyat of Omar Khayyam". Because of this the case is called The Tamam Shud Case.