On February 4, 1999, Amadou Diallo, a young African immigrant, was killed by four New York City police officers who fired 41 unanswered rounds at him. Since the shooting occurred in his South Bronx district, Díaz became an advocate and organizer for the Diallo family. Through a series of public appearances, hearings, press conferences and massive public demonstrations, Díaz led a citywide protest which drew national media attention.
On February 4, 1999, Amadou Diallo, a young African immigrant, was killed by four New York City police officers who fired 41 unanswered rounds at him. Diaz became an advocate for the Diallo family, organizing protests and demonstrations that garnered national media attention.