From Ammoland.com:

The American Civil Liberties Union of Pennsylvania and the law firm of McCausland Keen & Buckman filed a federal lawsuit today against the city of Philadelphia on behalf of Mark Fiorino, a gun rights advocate who legally carries an unconcealed weapon in public.

The suit alleges that the Philadelphia Police Department filed retaliatory charges against Fiorino after it learned that there was a YouTube recording of Philadelphia police officers threatening to shoot and screaming profanities at an unresisting Fiorino in February 2011. Fiorino was cleared of all charges in October 2011.