A Black Lives Matter protester in La Mesa, California, carries a shield as protection against attacks by counter-protesters and police crowd control activities.

A protester in San Diego, California, prepares a sign before a march in support of the Black Lives Matter movement.

Black Lives Matter protesters in La Mesa, California.

Black Lives Matter protesters hitch a ride atop a van during the protest in La Mesa, California.

Skateboarders and roller skaters arrive at the end of a "rolling march" in support of the Black Lives Matter movement. The event began at Balboa Park in San Diego and ended at the San Diego Convention Center.

A Black Lives Matter protester in San Diego, California, fist-bumps a passing motorist in a show of support for the movement.

Protesters are reflected in the front door's glass at the Santee office of the San Diego County Sheriff's Department. They marched in support of the Black Lives Matter movement.

Lawyers volunteering as legal observers - but specifically not as protesters - monitor law enforcement officers during a Black Lives Matter protest in La Mesa, California.

Members of a "wall of moms" take up positions behind steel barricades set up by the City of La Mesa in advance of a Black Lives Matter protest. Violent clashes were a major concern so the city restricted the possession of possible weapons within the protected protest area, as seen in the list taped to the barricade.

A woman raises a fist in solidarity during a Black Lives Matter protest in La Mesa, California.

A scuffle broke out at a Black Lives Matter protest in La Mesa, California, when a man (left, wearing black clothes and helmet) stomped on the flag, intending to provoke counter-protesters. One of the counter-protesters (right, wearing a blue shirt and black vest) rushed in, but other protesters quickly separated the two.

San Diego County Sheriff's deputies march into position to assist La Mesa Police Department officers during a Black Lives Matter protest in La Mesa, California. Law enforcement officers from National City, the Harbor Police and the California Highway Patrol also assisted.

Emergency lights from San Diego Police Department vehicles form shadows of marching protesters on the wall of a store. Police officers provided traffic control and escort duties for the group, who were protesting against police brutality.

Bystanders watch as firefighters pour water on the last remaining flames in a building destroyed during a night of arson and looting in La Mesa, California. The unrest followed a peaceful daytime protest sparked by the death in police custody of George Floyd in Milwaukee, Wisconsin and the arrest of a black man in La Mesa, claimed by many to be a case of excessive force.

A San Diego Sheriff's deputy and a firefighter look over a building destroyed during a night of arson and looting in La Mesa, California. The unrest followed a peaceful daytime protest sparked by the death in police custody of George Floyd in Milwaukee, Wisconsin and the arrest of a black man in La Mesa, claimed by many to be a case of excessive force.

A man boards up a broken window at the La Mesa Civic Center. Many windows in the facility were damaged during a night of arson and looting in La Mesa, California. Two bank buildings and a supermarket were burned during the night. The unrest followed a peaceful daytime protest sparked by the death in police custody of George Floyd in Milwaukee, Wisconsin and the arrest of a black man in La Mesa, claimed by many to be a case of excessive force.

A volunteer paints over graffiti left by a vandal after a night of arson and looting in La Mesa, California. The unrest followed a peaceful daytime protest sparked by the death in police custody of George Floyd in Milwaukee, Wisconsin and the arrest of a black man in La Mesa, claimed by many to be a case of excessive force.

A clean-up volunteer walks past a burned-out grocery store delivery truck. The truck was destroyed during a night of arson and looting in La Mesa, California. The unrest followed a peaceful protest earlier in the day which was sparked by the death in police custody of George Floyd in Milwaukee and the arrest of a black man in La Mesa that some say was an example of the use of excessive force.

A Chase Bank sign is one of the few recognizable things remaining after the building was destroyed during a night of arson and looting in La Mesa, California. The unrest followed a peaceful daytime protest sparked by the death in police custody of George Floyd in Milwaukee, Wisconsin and the arrest of a black man in La Mesa, claimed by many to be a case of excessive force.