Thing is DV was not taken seriously before by cops. The OJ Simpson trial changed that.
But I'll bet good money, there are cops that beat their wives.
“Experience should teach us to be most on our guard to protect liberty when the Government’s purposes are beneficent. Men born to freedom are naturally alert to repel invasion of their liberty by evil-minded rulers. The greatest dangers to liberty lurk in insidious encroachment by men of zeal, well-meaning but without understanding.” — James Madison