What we know about the Highland Park parade shooting suspect | ABCNL

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ABC News’ Aaron Katersky breaks down what we know about the suspected gunman who opened fire on a July 4 parade in Highland Park, Illinois, on Monday. WATCH the ABC News Live Stream Here: SUBSCRIBE to ABC NEWS: Watch More on LIKE ABC News on FACEBOOK FOLLOW ABC News on TWITTER: #ABCNLUpdate #highlandpark #massshootings #abcnews