Negligence in poor communities (basically 'let the gangs sort themselves out') was a major issue in the area where my mum worked growing up. She worked with kids with learning difficulties.
That's still the way the British police like it (and in the US as well I know) - the arrogant 'well our hands are clean' attitude. Same when knife crime became an epidemic with innercity youths there was massive inaction before doing anything about it, I suspect largely because on the whole it wasn't white kids
I've never used matrix but sure!