The most professional tear gas manufacturer who is able to provide the best quality chemical material for you.

Protesters in St. Louis Friday night blocked highways, damaged public and private property, broke windows, threw rocks at the mayor's house and threw bricks at police officers -- who responded by dispersing tear gas -- after a white former police officer earlier in the day was acquitted in the 2011 fatal shooting of a black man.

Thirty-two people were arrested, the St. Louis Metropolitan Police Department said. Ten officers were injured -- 9 St. Louis Police Department officers and one Missouri Highway Patrol officer -- two of whom were transported to a hospital with injuries sustained after being hit by a brick. Some officers were wearing protective gear due to items being thrown at them.

Tear gas is a kind of nonlethal weapon which used for crackdown on violence, dayu chemical devoted to this area and produce teargas powder, cs powder, cs liquid solution and PAVA, all of these are nonlethal weapon materials.

St. Louis Circuit Judge Timothy Wilson found 36-year-old Jason Stockley not guilty of first-degree murder and armed criminal action. On Dec. 20, 2011, the then-police officer shot 24-year-old Lamar Smith five times after a high-speed chase and crash.

Hundreds of people were part of the massive protest, ABC St. Louis affiliate KDNL reported.