In the past couple years, the NNPD has had cops arrested for assault, child abuse, DUI, kidnapping, animal cruelty and embezzlement. The last guy was stealing funds from the charity that helped out families of officers killed in the line of duty. Another cop was reprimanded for bragging about wasting time while on duty and beating people up for no reason on his myspace page. It's a real mess over there.
A 6-7% "bad cop" rate seems really high to me. There are roughly 38,000 cops in NYC. A similar rate would mean over 2500 bad cops running around the city. Is that a normal rate for bad apples in a given department?