On August 19, 1989, Troy Davis, a resident of the predominantly black, middle-class neighborhood of Cloverdale, Savannah, GA was convicted of the murder of local police officer Mark MacPhail. Although there have been inconsistencies surrounding his case he was sentenced to death row in 1991.
As inspiration for the “Making the Invisible Visible” street art project, graffiti artists Metalgassi and Amnesty International painted portraits of Troy Davis, on various places [mostly fences] throughout London.
There are some samples Troy Davis and other street portraits after the break.
Source: Illusion 360