sentences:  On September 28, 1919 a white mob launched a riot resulting in the brutal lynching death of African American civilian Will Brown, the death of two white rioters, the injuries of many Omaha Police Department officers and civilians (including the attempted hanging of Mayor Smith), and a public rampage that included the burning of the Douglas County Courthouse in downtown Omaha.The systematic carnage in Omaha ended a day later, after 1,700 federal troops from nearby Fort Omaha and Fort Crook came to the city which restored order and peace throughout the area.Police compiled a list of 300 alleged participants, with Dennison's "right-hand man" Milton Hoffman high on the list.