Deeply depressing. There does seem to be a recurring pattern of unarmed BME American males being shot by police. I get the impression that there are a number of factors adding up to a perfect storm:
Institutional racism within many parts (note, I did not say all, it may well not be all) of the US police.
Racial stereotyping...not sure this is the right term, but thinking about things like many surveys showing white people tending to automatically score black men as more threatening than white men, the age misjudgement thing, perceptions on liklihood of someone being engaged in a criminal act/armed.
The ludicrous gun situation. If you live in a country where guns are handed out like smarties (90 guns per 100 people....that's actually higher than the number of vehicles per person, which is 809 per 1000!) then the police will, not exactly unreasonably, start assuming that every person they meet is carrying a gun. And thus be a lot more likely to shoot "first". Scary.
Oversight. Or lack thereof. If this killing had not been filmed...
Unequal access to justice. Now, some of this may well be that justice is a rich man's game, and rates of poverty amongst the BME population are themselves very worrying. But it is fascinating to look at the relative conviction rates for black vs white, and the sentences handed down. Frankly, if you're a black male with low educational achievement and mental health problems, and get charged with a crime, you're screwed.
The problem is, of course, that there's no quick fix for any of those (although mandatory minicams on US cops might help slightly with one of them). I hate to think how scared US parents must be for their kids who are GUWB (growing up whilst black).