Supporters of Mumia Abu Jamal believe there is a real possibility to free the nation’s best known political prisoner. Activists gathered inside and outside a Pennsylvania court to demand that the Philadelphia district attorney turn over all records on Ronald Castille, the former DA that helped convict Abu Jamal in the death of a cop and then, as a judge, ruled against his appeals. “They’ll try to make us think Castille had no involvement in the case, but that is patently false,” said Gwen DeBrow, of the Campaign to Bring Mumia Home.