There are various accusations made against the police. Including that it is institutionally racist. That black areas are ‘over policed’, that the criminal justice treats black people worse.
There is undoubtedly some truth in all of this. There are likely to be more police in areas with higher crime and we know that police stop and search black people at a higher rate than white people. This could explain higher rates of conviction for possession and knife crime. Since this could simply be a function of being stopped more.
But what about murder? This is a crime that will always be investigated and it seems likely that conviction would not be significantly swayed by race.
However the prevalence of black murderers is 6 times higher than population % would suggest.
You are also far more likely to be a victim of murder if you are black. 15% of victims are black compared to 3% of the community.
All data from the ONS