“We have received information of a potential large scale protest in the Central Business District. There is a belief that President Trump will soon move to fire Special Prosecutor Mueller. This would result in a large protest within 24 hours of the firing. The protest would be semi-spontaneous and more than likely happen on short notice. Beginning Thursday, all Major Crimes detectives will be required to have a full uniform and any issued protective equipment, like riot gear, until further notice."
-Commander Victor Joseph in an email sent to Pittsburgh detectives.