[Marlowe answers this question without hesitation, turning away from the window to glance at Erwin.]

I'd heard about the corruption in the Military Police--who hasn't? And it's sickening, to think that the interests of the people are served by those who only care about themselves. I determined that the best way to combat that corruption would be from within. Who else could have the ability, the necessary influence, to clear out the trash from the ranks?

[He frowns, angered by the thought of the scum holding people's lives and livelihoods in their hands. It's disgusting.]

In retrospect, perhaps I should have joined the Survey Corps. The system may be too corrupt to salvage as I believed I could.