On this date in 1924, Chicago North Side gang boss Dean O’Banion was shot and killed in the back of the Schofield flower shop (pictured above), which served as his headquarters. Apparently the Chicago Outfit, which ran the South Side, decided it didn’t like the competition. They sent some of the boys to visit O’Banion in his shop. They gunned him down as he was working on a floral arrangement for mob luminary Mike Merlo’s funeral. The hit touched off a gang war between the two factions that would last five years, and would come to an end in the wake of the 1929 St. Valentine’s Day Massacre.
Wikipedia – Dean O’Banion
Graveyards of Chicago – Dion “Deany” O’Banion