CHICAGO—A mass shooting that started with a brawl among a group of teens has left two people dead and eight wounded late Thursday, blocks from the Magnificent Mile, according to Chicago police, who say they have one person in custody.(snip) The shooting happened about 10:40 p.m. in the 800 block of North State Street outside the Chicago Avenue subway station and a McDonald’s at 10 E. Chicago Ave.(snip) In a statement, Mayor Lori Lightfoot decried the “outrageous act of violence” and promised to put more police officers in the area, including a fixed post at the intersection and another at...