Some of the duties you would be taking on consist of the following:
I. Reconstructing the available evidence from crime scene
II. Create profiles of suspects along with behavioral patterns
III. Maintain records of criminals with abnormal behavior
IV. Interview criminals and terrorists to gain an understanding of motives
V. Provide insights that can assist in the apprehension of criminals
These are just a few of the duties for an FBI behavioral analyst. Resources: FBI Profiling-FBI Retired Profiling, FBIretired Official Site, Books related to FBI Behavioral Analysts, FBI Blogs, and FBI Documentaries.
Check with colleges/universities what the academic requirements are especially supervised practicum experiences.