NEW : The teenager is identified as 17-year-old David Manson , of the 1000 block of North Kedzie Avenue in Chicago. : Two other people were injured in the attack . NEW : Police are searching for the suspect , who opened fire in broad daylight .
NEW : The teenager is identified as 17-year-old David Manson , Jr. NEW : Two other people were injured in the attack . NEW : Police are searching for the suspect , who opened fire in broad daylight .