Yes.

The idea that there are cops on safari hunting black people is a fundamentally absurd notion. When it is clear that the officer was involved in a "bad shoot", those officers are removed from duty and charged with murder/manslaughter. If you can point me to one that was not, I'd be very interested to learn more. However, it is often difficult to determine a bad shoot from a "good" one, which is the primary issue.

Cops disproportionately target black Americans because black Americans commit a disproportionate percentage of the crime in America. And you don't need to stop at the overall crime rate, you can look at how black Americans kill a disproportionate number of cops.

  There were 511 officers killed in felonious incidents and 540 offenders from 2004 to 2013, according to FBI reports. Among the total offenders, 52 percent were white, and 43 percent were black.[1]

And according to the 2010 US Census [2], the racial split in the US was:

  White: 72.4%
  Black: 12.6%

I think the numbers speak for themselves. Do these numbers justify cops killing unarmed civilians that pose no threat? OF COURSE NOT. But that is almost never the case. Remember, cops are not the military (they are not tried in internal military tribunals), and they do not have immunity. At the end of the day, it is up to the DA to bring charges against a police officer, and the DA will usually not bring said charges if that DA does not think he/she can prove in a court of law that it was a bad shoot. So yes, there are racist cops. But that should only be a crisis if you believe the US' entire justice system to be racist against black people.

[1] - https://www.washingtonpost.com/news/fact-checker/wp/2015/01/...

[2] - https://www.census.gov/prod/cen2010/briefs/c2010br-02.pdf