Highland Park, Illinois, Police Chief Lou Jogman names a person of interest in the shooting at a July 4th parade in the Chicago suburb. CNN’s Wolf Blitzer is joined by former Philadelphia Police Commissioner Charles…

Police in the Chicago suburb of Highland Park, Illinois, are still searching for the gunman, who they described as a man between the ages of 18 and 20. SUBSCRIBE to ABC News: https://bit.ly/2vZb6yP WATCH MORE…

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