The titular location is called "crooked" because "the gunman kill and go free to kill again."  
One image in this poem is "an ignorant fighter [laughing] who has never lost a battle," and another is "a tall bold slugger set vivid against the little soft cities."  The speaker has "seen marks of wanton hunger" on "the faces of women and children" and has also "seen your painted women under the (*) gas lamps luring the farm boys."  The titular location is called "crooked" because "the gunman kill and go free to kill again."  Called "Hog Butcher for the World" and "the Nation's Freight Handler," for 10 points, name this Sandburg poem about a titular midwestern "City of the Big Shoulders."
One image in this poem is "an ignorant fighter [laughing] who has never lost a battle," and another is "a tall bold slugger set vivid against the little soft cities."  
{Chicago}