Police fired tear gas after rioting broke out for a second night in Missouri after a black teenager was shot dead by police over the weekend.
Eighteen-year-old Michael Brown was killed in Ferguson, a mostly black suburb of St. Louis.
Police said his death followed a struggle with a gun. A witness said Michael raised his hands to show he was unarmed before being killed.
Michael Brown Sr., father of the victim, spoke at a press conference.
“If you have any information, please, please give it to us,” he pleaded.
“We need police reports, we need to know everything, we need everything. We want this done. We are going to do this right I don’t want any violence, we don’t want any violence. He wouldn’t have wanted none of it,” Brown Sr. added.
The teenager’s mother said her son had been planning to study heating and air conditioning repair at a technical college.
Speaking through tears, Lesley McSpadden said her first-born son’s first day back at school would have been Monday.
“We can’t even celebrate,” she said.
Police arrested around 15 people during that mostly peaceful demonstration.
Three of the Ferguson Police Department’s 53 members are black, said police chief Tom Jackson. About two-thirds of Ferguson’s population are black, according to US Census figures.
Brown’s family has hired the same solicitor who represented the family of Trayvon Martin, a black teenager shot dead by a community watch volunteer two years ago.