It's a Lot of Filing Papers and Reading
The job of an FBI agent consists of a lot of paperwork. They're all about the paper trail, that's for sure. If you want your own file, you can request it. They can send you a file on anyone you want as long as you have their signature. You can also request files of people who have passed away.
All Work, No Play
An FBI agent doesn't have a traditional 9-5 schedule. Often times, they're called in at random points on their "day off" to help deal with something. Crime doesn't stop just because it's someones day off!