St Louis - Protests turned violent for a second night near St Louis following the acquittal of a white former police officer in the fatal shooting of a black man, as a small group of demonstrators refused to disperse, breaking windows at dozens of businesses and throwing objects at police, who moved in with hundreds of officers in riot gear to make arrests.The confrontation took place late Saturday night in the Delmar Loop area of University City, a suburb about 16 km west of St Louis near Washington University. The area is known for concert venues, restaurants, shops and bars, and includes the Blueberry Hill club where rock legend Chuck Berry played for many years.University City had been the scene of a peaceful march earlier in the evening to protest a judge's ruling on Friday clearing ex-officer Jason Stockley of first-degree murder in the 2011 shooting of 24-year-old Anthony Lamar Smith. That march ended with organizers calling for people to leave and reconvene Sunday afternoon.But a few dozen protesters refused to go. Police ordered them to disperse, saying the protest was illegal. Hundreds of police in riot gear eventually moved in with armoured vehicles. The demonstrators retreated down a street, breaking windows with trash cans and throwing objects at police.Several protesters were seen in handcuffs, and city and county police later tweeted that they had arrested at least nine people. Police were seen carrying one handcuffed man away from the scene upside down. At least one demonstrator was treated after he was hit with pepper spray.After the spasm of violence ended, a reporter for The Associated Press found at least half of the businesses on one side of the street with broken windows along a two block area.Sam Thomas, who was helping his friend clean up the glass from the shattered windows of his clothing and accessories boutique, OSO, said he understood why people were angry. The U.S. justice system is broken and needs to be fixed, Thomas said."I'm not saying this is the right way to fix it," he said of the damage."The window isn't murdered. Nobody is going to have a funeral for the window. We can replace it."Officers in hospitalOn Friday night, nearly three-dozen people were arrested and 11 police officers suffered injuries, including a broken jaw and dislocated shoulder. Five officers were taken to hospitals. Police said 10 businesses were damaged that night, and protesters broke a window and spattered red paint on the home of St Louis Mayor Lyda Krewson.Saturday night's violence capped a day of noisy but peaceful demonstrations at suburban shopping malls.Protesters shouted slogans such as "black lives matter" and "it is our duty to fight for our freedom" as they marched through West County Center mall in the suburb of Des Peres, west of St. Louis. A group also demonstrated at another suburban shopping center, the Chesterfield Mall, and at a regional food festival.Organisers hoped to spread the impact of the protests beyond predominantly black neighbourhoods to those that are mainly white.Smith's death is just one of several high-profile US cases in recent years in which a white officer killed a black suspect, including the 2014 killing of Michael Brown in nearby Ferguson that sparked months of angry and sometimes violent protests.Stockley wasn't charged until May of last year, which was three years after he left the force a moved to Houston and more than four years after his December 2011 confrontation with Smith.Stockley shot Smith after Smith fled from Stockley and his partner, who were trying to arrest him for a suspected drug deal.Stockley, 36, testified that he felt he was in danger because he saw Smith holding a silver revolver when Smith backed his car toward the officers and sped away.Prosecutors said Stockley planted a gun in Smith's car after the shooting. The officer's DNA was on the weapon but Smith's wasn't. Dashcam video from Stockley's cruiser recorded him saying he was "going to kill this (expletive)." Less than a minute later, he shot Smith five times.Stockley's lawyer dismissed the comment as "human emotions" during a dangerous pursuit. St. Louis Circuit Judge Timothy Wilson, who said prosecutors didn't prove beyond a reasonable doubt that Stockley murdered Smith, said the statement could be ambiguous.