Mumia Abu-Jamal is serving a life sentence for killing a police officer in 1981. Not all agree this is just and some question whether a fair trial occurred. The man was a member of the Black Panther Party.
Black Panthers weren’t a political party, but an interest group active during the 1960s through to the 1980s. The organization was initially created to draw attention to the need for greater police protection in African American neighbourhoods. It became something else, linked to Marxist ideology, and more generally focused on poverty alleviation in the USA. Black Panthers were seen by the establishment and US government as some sort of domestic, internal terrorist threat. This may be over the top, though Black Panthers did stroll neighborhoods armed, and violence sometimes occurred. As the group struggled to evolve and find its purpose, though, a fair amount of this violence was internal.
Rap metal musicians Rage Against the Machine sang in 1989 how we are at war until Abu-Jamal is freed.
Also by RATM: Killing In The Name