Eight-year-old girl shot dead by Chicago gunman targeting someone else

Police superintendent says department will not rest' until killer of Melissa Ortega, a recent arrival from Mexico, is found

A gunman targeting someone else on Chicago's south west side instead shot an eight-year-old girl in the head, killing her, police said.

The Cook county medical examiner's office identified the victim on Sunday as Melissa Ortega, whose family recently moved to Chicago from Mexico.