On Nov. 5, ACT UP Boston, labor leaders, frontline harm reductionists, housing advocates, contingents of students, folks who have been houseless and people who use drugs converged on City Hall for a protest press conference and speak-out. Days earlier, city officials began waging their “sheriff’s plan,” setting up kangaroo courts, trashing tents and jailing people who had been living in a large encampment in the city’s Newmarket neighborhood.