Over the weekend in Ferguson, Mo., an unarmed 18-year-old black man named Michael Brown was shot and killed by a police officer. The incident is under investigation by the St. Louis County police department and reports indicate the FBI has opened a “civil rights investigation” of the shooting. Meanwhile, riots and angry protests have erupted for five consecutive days and nights in defense of Brown. As unrest grew, police used tear gas to dissolve crowds. These photos are a brief look into the chaos that has engulfed the St. Louis suburb since Saturday.

>>> Overmilitarization: Why Law Enforcement Needs to Scale Down Use of Military Hardware and Tactics

Huffington Post reporter Ryan J. Reilly is arrested trespassing when police officers  closed a Ferguson, Mo., McDonald's restaurant on West Florissant Avenue on Wednesday, Aug. 13, 2014. (Photo: Robert Cohen/St. Louis Post-Dispatch/MCT)

Huffington Post reporter Ryan J. Reilly is arrested for trespassing after police officers closed a McDonald’s restaurant on West Florissant Avenue  in Ferguson on Aug. 13. (Photo: Robert Cohen/St. Louis Post-Dispatch/MCT)

Mya White, in hat, shown in this August 11, 2014 file photo, was shot in the head during a demonstration in Ferguson, Missouri on August 13, 2014. White was shot in the head by a passing car as people demonstrated. (Photo: UPI/David Broome)

Mya White, wearing a red hat in this Aug. 11 photo, was shot in the head Aug. 13 from a passing car during a demonstration in Ferguson.  (Photo: UPI/David Broome)

Tactical officers work their way north on West Florissant Avenue in Ferguson, Mo., clearing the road of residents, on Wednesday, Aug. 13, 2014. (Photo: Robert Cohen/St. Louis Post-Dispatch/MCT)

Tactical officers work their way north on West Florissant Avenue on Aug. 13, clearing the road of residents. (Photo: Robert Cohen/St. Louis Post-Dispatch/MCT)

St. Louis County Police Chief Jon Belmar briefs reporters on the recent shooting during a riot on August 12.

St. Louis County Police Chief Jon Belmar briefs reporters on the  shooting during a riot Aug. 12. (Photo: UPI/Newscom)

Police officers block West Florissant Avenue near the site where riots and protests have occurred over the past five days. (Photo: EPA/Newscom)

Police officers block West Florissant Avenue near the site of riots and protests. (Photo: EPA/Newscom)

Scenes from the clean up on Monday, Aug. 11 2014, after a after violent night. (Photo: Laurie Skrivan/St. Louis Post-Dispatch/MCT)

The aftermath Aug. 11 following a violent night. (Photo: Laurie Skrivan/St. Louis Post-Dispatch/MCT)

Workers clean up on after chaos the night before. (Photo: Laurie Skrivan/St. Louis Post-Dispatch/MCT)

Workers clean up after looting the night before. (Photo: Laurie Skrivan/St. Louis Post-Dispatch/MCT)

Officers work their way north clearing the road of residents, on Wednesday, Aug. 13, 2014. (Photo: Robert Cohen/St. Louis Post-Dispatch/MCT)

Officers try to clear the streets Aug. 13. (Photo: Robert Cohen/St. Louis Post-Dispatch/MCT)

During the fourth night of unrest, a rotester takes shelter from the tear gas exploding around him. (Photo: David Carson/St. Louis Post-Dispatch/MCT)

During the fourth night of unrest, a protester takes shelter from the tear gas exploding around him. (Photo: David Carson/St. Louis Post-Dispatch/MCT)

Protesters retreat as tear gas canisters detonate around them. (Photo: Chris Lee/St. Louis Post-Dispatch/MCT)

Protesters retreat as tear gas canisters detonate. (Photo: Chris Lee/St. Louis Post-Dispatch/MCT)

Protesters hold a peaceful demonstration of their displeasure during the second day of protests in front of the QT that was burned to ruins the night before during the riot. (Photo: Richard Ulreich/ZUMA Wire/Newscom)

These men demonstrate their displeasure during the second day of protests in front of the QT that was burned to ruins the night before. (Photo: Richard Ulreich/ZUMA Wire/Newscom)