The problem isn't the number of incidents but that these officers are being shielded by their comrades in arms. Nothing happens. That's a serious issue even if it's only a few.
And it's not even "a few." Systemic, racist discrimination per official, mandatory policy like stop-and-frisk means that all manner of cops are obligated to harass innocent minorities (at risk of being reprimanded). We're talking tens of thousands of officers in the NYPD alone behaving reprehensibly. The few bad apples thing just isn't true.