Crappy journalistic research.
It's "just" the chief of the Hessian section of the DPolG, not the Chief on the federal level.
And there's several police unions as well, with the DPolG only being second largest (about half as big as the GdP with a few micro unions not worth mentioning).
Don't blame the journalists, blame me. I'm the one who translated the article for Game Politics, and due to my relatively poor German skills (I've been learning German as a second language), I made a mistake. I actually caught it and emailed a correction -- I wasn't initially sure how best to translate the guy's job title -- but I don't think Dennis saw my email, and the internet merely amplified the error. Hopefully there weren't any other major mistakes... I like to think I do a better job than Google Translator, but I would never compare myself to a native speaker.