The Denver Police Department has issued a bulletin asking law enforcement officials to be on the lookout for stockpiles of supplies that could be used by “violent demonstrators” during the Democratic National Convention (DNC) next week, but civil libertarians are criticizing the memo for containing a broad list of innocuous items including bicycles, helmets and maps. Reports of such items will also be recorded and held for an indefinite period of time by a state “fusion” center, a place meant to share reports of “suspicious activities” with local, federal and military officials.