Posted by Michael Scherer
The Denver Police Department "is asking all police, ambulance and fire personal to be on the lookout for stock piles and caches of supplies that could be used by violent demonstrators at the up coming Democratic National Convention [sic]," according to an official release that has been obtained by the Colorado ACLU. (I can't find an online link to the document.)
In addition to clearly suspicious items like "chemicals" and "gas masks," the Denver PD lists these items of concern:
Maps: "Maps are frequently used by violent protesters to plan direct actions against conventioneers."