Amadou Diallo (September 2, 1975 – February 4, 1999) was a 23-year-old Guinean immigrant in New York City who was shot and killed on February 4, 1999 by four New York City Police Department plain-clothed officers: Sean Carroll, Richard Murphy, Edward McMellon and Kenneth Boss. The four officers fired a total of 41 rounds. The shooting took place at 1157 Wheeler Avenue in the Soundview section of The Bronx. The four were part of the now-defunct Street Crimes Unit. All four officers were acquitted at trial in Albany, New York.
Diallo was unarmed at the time of the shooting, and a firestorm of controversy erupted subsequent to the event as the circumstances of the shooting prompted outrage both within and outside New York City. Issues such as police brutality, racial profiling, and contagious shooting were central to the ensuing controversy.