but in bristol area and active all the way down to guilford. >> despite the intelligence, shu yu wang is illusive but lee has a breakthrough. painstaking cross checking reveals that wang is enrolled as full-time student at six different british universities. >> we think he is going from one university to another. in order to legitimize his role as a student. for a student immigration visa. so he is taking somebody else's place on that course. he is just not attending but he will use that to his justify being who are to immigration. he will say, actually i'm a student. >> wang is using his student standing to avoid time limitations ever his immigration status but now detective lee hopes to turn the tables and track him down at one of the universities. >> i've got an interest in a character i think may have a