[Myrddin]

Whenever I see a post calling it the "knockout game" and talking in a non-descript way about "teens", I provide a link to White Girl Bleed A Lot where Colin Flaherty has a few years of documented attacks. There's some history. A study of Detroit over the last 40 years is instructive as well.

[Salamander]

I have seen that book advertised and personally, I never walk alone. :)