Michael Brown’s family say they are “crushed” by the grand jury’s decision not to charge Officer Darren Wilson.
Michael Brown Sr. told NBC news his son’s character had been “crucified”.
Separately, Michael Brown’s mother said Darren Wilson had been “disrespectful”.
Darren Wilson, who shot dead Michael Brown in Ferguson, Missouri, on August 9, has told ABC he has a “clean conscience”.
There were protests over the ruling in 13 US cities on Tuesday night.
However, police said security was “much better” than Monday, when there was widespread rioting and looting, and more than a dozen buildings were set alight.
About 2,000 National Guard troops were deployed in the city on Tuesday night, up from 700 on Monday. Forty-four people were arrested.
Rallies in the area continued on November 26, as at least 200 protesters gathered outside St Louis City Hall, holding a mock trial for Darren Wilson.
Some demonstrators stormed the hall, shouting “shame, shame”, and forcing police to lockdown the building, AP news agency reported. Two people were reportedly arrested.
Anger at the ruling has spread to cities across the US.
Protests were reported on Tuesday night in 12 cities, in addition to Ferguson: Philadelphia, Seattle, Albuquerque, New York, Cleveland, Los Angeles, Oakland, Minneapolis, Atlanta, Portland, Chicago and Boston.
Those demonstrations were mostly peaceful, but rioting broke out in Oakland, California, where protesters started a street fire.
In Los Angeles, 130 protesters were arrested for disorderly conduct, the LA Times reported.
Police also arrested several demonstrators in Boston, Atlanta and New York, Reuters said.
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