FBI,DEA, ATF, S.W.A.T, Secret Service... ect.... Degree?

I want to finish school with a degree that will help me to get one of these jobs. I would like to do more of the "office end" of the work. Does anybody know what the best thing to get my degree in would be? I dont want to be a police officer. Im not interested in pulling people over, i want more of the dirty crime. What would i get my degree in if i wanted to do more of the investigations side of everything? Thanks for any help.