Group Cornering News Today

David muir is coming up next. Im kristen sze. Im dan ashley. Hope to see you again at 6 00. Tonight, the chilling new video just released. What it now reveals about the gunman in the dayton massacre. Seen before the shooting with his sister and a friend. And where he was the night before. Also tonight, the violent clashes erupting at the hong kong airport. Authorities targeting prodemocracy demonstrators. Those demonstrators beating an officer when he draws a gun. A reporter targeted, accused of...

To abandon travel plans for a second day in a row as hundreds of flights were canceled. >> all they know is theyre angry and nobodys listening. >> reporter: it began as a protest over extradition law to china but grew into a massive pro-democracy campaign. targeting airport officials with laser pointers, hurling plastic retreat. police in riot gear quickly moving in, grabbing protesters, taking them down one by one. one group cornering and beating this officer until he drew his weapon. the crowd...