Six years ago, Portland's federally-required police oversight committee was in disarray. Now, it appears its replacement has reached a similar point. Dubbed the Community Oversight Advisory Board (COAB), the 15-person group of volunteers was tasked with overseeing the city's 2014 settlement agreement with the US Department of Justice, a decision meant to repair Portland Police Bureau's damning record of using force against people with mental illnesses. Part of the agreement required a level of community...