Activists challenge a police policy under which protesters can be arrested rather than only cited. Civil-rights activists say a Denver police policy could result in mass arrests and a clogged jail during the 2008 Democratic National Convention, and they have filed a claim seeking monetary damages over its use last Columbus Day parade. "We think there is a strong possibility that Denver is headed for a very disastrous and catastrophic situation," said Mark Silverstein, who directs the Colorado American Civil Liberties Union. The policy regards police handling of misdemeanor offenses committed by protesters. Until last year, Denver's policy for minor...