For example, this statement was taken from Dailywire:
"4. There were almost 6,000 blacks killed by other blacks in 2015.
By contrast, only 258 blacks were killed by police gunfire that year."
Now, let's assume there are 6 million black people in that population.
And 6000 police officers.
It means among the black population, there was a killing rate of 1/1000.
And among the police population there was a killing rate of 1/20.
Even with 60 000 police officers, it would still be a killing rate of 1/200, which is 5x higher than for the general black population.
So, if you're black you're more likely to be killed if you come across a police officer than if you come across any other black person.
(Note: My numbers are made up, but probably more accurate than saying you're more likely to be killed by a black person than by a police officer. True, but also highly misleading.)
The problem is confounded by the lower education levels, greater poverty and lower employment levels among black populations, particularly in big cities.
I'd welcome some decent statistics, but I'd be prepared to bet that on a stratified population study, comparing socio-economic levels, crime rates and gun crime rates between blacks and whites wouldn't be so different.