Prosecutors in Freddie Gray case say police source is leaking an 'arsenal of material' to the defense
Freddie Gray seen in a video being arrested by Baltimore officers (Screenshot)

BALTIMORE — At least one former or current member of the Baltimore Police Department has been "actively working" with defense attorneys for the six officers charged in the arrest and death of Freddie Gray, according to prosecutors — leaking them an "arsenal of material" to use in a "campaign of public relations warfare." Deputy State's Attorney…