‘The settlement was announced by the American Civil Liberties Union (ACLU), which sued the city on behalf of three photographers, a filmmaker, and four others who were observing the protests–but not participating–when they were swept up in the mass arrests on August 25, 2008.’

http://pdnpulse.com/2011/08/denver-settles-lawsuit-for-wrongful-arrests-of-photographers-others.html