CINCINNATI — Police were studying mall surveillance video Tuesday in their investigation of the fatal shooting of a 16-year-old Ohio boy authorities say tried to rob a shopper in his quest to obtain popular, limited-edition athletic shoes. Miami Township police said a man with a concealed weapon permit fired his gun after he and another man were accosted Saturday morning by three teens on a sidewalk outside the Dayton Mall. Police said one teen had showed a gun. Jawaad Jabbar of Middletown died a short time later of a gunshot wound to his torso, authorities said.