[So where was he...? Oh right. He frowns and then inhale, exhale...]

Dollars is a newer gang. Honestly, I don't know that much about it - they hada major meeting a few months back and I heard they have a thing to do with these slashings lately - and the Headless... well, Celty-san might be involved with them too. But the point is they're new and seem to be really powerful lately in Ikebukuro.