Old Wounds Reopened in Ferguson, Missouri

Images of a fragile city emerge with a teen in critical condition, dozens arrested and police in riot gear.
3:00 | 08/12/15

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Transcript for Old Wounds Reopened in Ferguson, Missouri
Good evening and it's great to have you with us. We begin tonight with that developing headline out of Ferguson, Missouri, the state of emergency in place and now dramatic images coming in showing the moment those peaceful protests gave way to violence. This week we all saw the images of that parking lot on the one-year anniversary of Michael brown's death, that gunfire erupting, bystanders running for cover. Tonight new surveillance video showing something we had not seen before, as that crowd flees, police pointing out that you can see that young man there holding a gun. Later he was shot, critically injured. Authorities say he drew his weapon first. Heavily armed men, calling themselves patriots, moving in to patrol Ferguson. Some shouting go home. Reporter: Tonight newly released video showing the frantic moments as gunshots send people scrambling for cover Sunday night. A tense scene on the anniversary of Michael brown's death. Police say Tyrone Harris drew first. And the video shows him grabbing a gun out of his waist band seconds before he was shot by officers. Tonight Ferguson on edge. More than 100 arrests following two consecutive nights of violent clashes between police and protestors. This is the St. Louis county police. Stay off the roadway. Reporter: Riot police using mace to disperse the crowds last night, moving in quickly after authorities say rocks and frozen water bottles were thrown at them. St. Louis county police enforcing a state of merge, emergency but now dealing with a new complication. The old keepers are back, heavily armed men we first saw on the streets of Ferguson last year, tonight telling me they're out to protect the citizens of Ferguson from police. Your group is there walking the streets with visible -- What would you choose other than a rifle? What do you think is going to happen tonight? I hope things are calmer. That's the goal to keep people alive. Reporter: Some Ferguson residents claiming a double standard. The idea of a black person carrying an assault rifle even in the state of Missouri while we have a police problem killing unarmed black people, yeah, it would be a problem. Reporter: The oath keepers say it's unclear if they'll be back on the streets of Ferguson again tonight. That emergency declaration is still in effect and police say they plan to be out in force this evening. David?

This transcript has been automatically generated and may not be 100% accurate.

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