Tyrone Harris, 18, was shot by police on Sunday and is in critical condition. He has been charged with four counts of assault on law enforcement, among other things.
Newsweek spoke with Joe Biggs to find out why he is in the Missouri city with armed Oath Keepers.
Police arrested at least 23 people late Monday night.
People blocked Interstate 70 during ongoing demonstrations to mark the one-year anniversary of the death of Michael Brown Jr. in Ferguson, Missouri on Monday.
Wesley Lowery and Ryan Reilly were charged with trespassing and interfering with a police officer during protests in Ferguson last year.
About 50 people reportedly were taken into custody outside the St. Louis federal courthouse.
Harris was charged on four counts, including "assault on law enforcement," after a gunfire exchange on the anniversary of the shooting of Michael Brown.
Officials issued a state of emergency Monday in St. Louis County.
One man was shot Sunday night after a peaceful weekend of street protests to remember the black teenager.
A man who opened fire on police was wounded in an ensuing gun battle with officers, after a day of peaceful rallies commemorating Michael Brown's death turned violent.
The councilman reportedly claimed DOJ draft proposals for police and court reform would bankrupt the city.
President Obama has vowed to demilitarize police. Get ready for a long war.
The DOJ's decision to launch a probe there is the latest in a string of investigations into police forces around the country.
A witness to the Michael Brown shooting has filed a lawsuit against the city of Ferguson and police.
The family is also seeking changes in policing.
Jeffrey L. Williams, 20, has admitted to firing the shots that wounded the officers.
Police arrested and charged 20-year-old Jeffrey Williams with assault in the first degree for the shooting of two police officers.
Two police officers shot yesterday during demonstration as Obama says 'criminals' must be brought to justice
The two officer hit by gunfire were treated a local hospital and released.
The officers are expected to survive their injuries, St. Louis county police chief Jon Belmar said Thursday morning.
The conditions of the officers is not known but they are both conscious and at a local hospital.