I welcome more data that has less sampling bias, but without some attempt to quantify the amount of sampling bias here we don’t know if it has a big impact on this data.
>>randyr+(OP)
It's presupposing a negligible effect of racial bias on arrest data. That's a very good reason to not use it in showing a negligible effect of racial bias on another scenario involving police. I'm struggling to think of a better example of a circular argument.
>>randyr+(OP)
It is on you if you don't take the testimony of hundreds of thousands of black people that they're terrorized by the police as evidence of possible police brutality.
Does that sound absurd? Is it as absurd as presuming the police would incriminate themselves with the data they create?
All evidence you can gather will be indirect. You make your judgment based on which you consider relevant.