Rather it's about racism being endemic in the US police force (and to an extent this being symptomatic of racism within elements of the wider society).
Yes, there is. Of course the dataset is limited because this is just shootings, and doesn't include instances of police murdering people through choking or neck-kneeling.
As a rate of /per police interaction, black people are less likely to be killed by the police than white people. There are over 300 million police interactions with citizens every year, and of those 300 million interactions, there are less than 10 unarmed black people killed by police each year.
In the 3 months of BLM/anifta riots in the US, many more black people have been killed by the BLM terrorists than unarmed black people will be by police in a year. This is only counting in the riots. If a black person is going to be killed by another person (justified or not), they are over 250 times more likely to be killed by another black person (who is not the police), than being unarmed and by the police.
If you are referring to Floyd, the medical examiner said in his report that if he had not been influenced by the video of Floyd's last minutes, he would have said that Floyd died from a drug overdose. Floyd's lungs were twice as heavy as what was to be expected; this explains why Floyd was saying that he couldn't breathe before he was put into the police car and while he was still standing on his feet.