On September 5, 1923, as Capone and Johnny prepare to shift their base of operations to Cicero, Spike O'Donnell is gunned down by O'Banion's men in a turf war.
In September 1923, as Al Capone and his partner were about to move their operation to Cicero, Spike O'Donnell was assassinated by O'Banion's gang in a violent struggle for control.