I think I remember the YRE stuff being mentioned when this news started drippings out , ages ago, and wondering why they would have been spying on what to my knowledge was never a very high profile group. Bit before my time but I'd barely even heard of them.
It seems now that they used YRE as an 'in' to these black justice campaigns presumably because they didn't believe any black officers they had at the time could be trusted to shit on 'their own', YRE were their way of getting white undercovers in to spy on grieving black families. The whole thing is unbelievably sick.
I still don't get why this was worth it for them though, what was the endgame for whoever sanctioned this, just their pension? That's it?