We had a family member who was a Special Agent with the FBI. She had been in the military and then completed college. Then I believe the actual training was 8-9 months in Virginia. The college degree is likely a necessity, but not the military. It will take you longer to get accepted than the training. There is an FBI office somewhere near you, probably in the Federal Building. I would honestly suggest you go there and ask what you seeking. If you are a student investigating the FBI as a career someone will give you a few minutes. Good luck.