Corporate security is the most sought after gig for cops. It attracts the best of the best. Certainly the most ambitious.

If someone were to ever dump the texts and emails of a major city PD, it would open a lot of eyes.

It might do, if that city had some level of public trust in its police. I don't know what, say, Los Angeles coppers could commit to record that might lower opinions. Beating confessions out of golden eagles? Cannibalism? The mark of the beast? Everyone already assumes they do this.