1891 New Orleans lynchings
The 1891 New Orleans lynchings were the murders of 11 Italian Americans, immigrants in New Orleans, by a mob for their alleged role in the murder of police chief David Hennessy after some of them had been acquitted at trial. It was the largest single mass lynching in American history.
Source: Wikipedia — 1891 New Orleans lynchings (CC BY-SA 4.0)