Do you mean by csi a crime scene investigator? A good csi spots details, looks for things that "aren't right," keeps a history of events, has the knowledge to know what tests to run, is a huge help to society in helping deter criminals, job satisfaction, gets paid for enjoying his/her work, and a host of others. If this is not exactly the kind of answer you were looking for, please rephrase the question and I'll try again.
