National moment of silence to rally against police brutality to be marked at Civic Center Park

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DENVER -- A national moment of silence will be held Thursday after another tense night in Missouri. The vigil will honor the unarmed teenager who was shot and killed by a police officer last weekend, and hundreds are expected at Civic Center Park to rally against police brutality.

Denver is one of 80 cities across the country that will participate in the rally. It's attracting a lot of attention on Facebook and Twitter with the hashtag #NMOS14. In Denver, hundreds are expected to show up in red, a symbol of solidarity after another night of turmoil in Ferguson, Mo.

Police threw tear gas at protesters overnight in Ferguson. Police maintain Michael Brown was shot during a struggle where he tried to grab the officer's weapon but admit they're still piecing the story together.

New witness Tiffany Mitchell says she saw the unarmed teenager backing away when he was shot.

Denver will join the protests in Ferguson and will honor all lives lost in police brutality cases.

The rally at Civic Center Park is scheduled for 5 p.m.