I enjoy investigating a wide variety of fraud cases ranging from employee theft to identity theft, to bank fraud and more. It is very exciting to start with basicly nothing and start following a trail and before you know it you have uncovered a fraudulent case.
Cons
The work hours are sometimes very long, in order to conduct a succesful fraud investigation one must be willing to look through mounds of paperwork and long hours on the computer plus interviewing suspect to pin down a fraudster.