FILE - Protesters and police face each other during a rally for George Floyd in Minneapolis on May 26, 2020. (Richard Tsong-Taatarii//Star Tribune via AP, file)

FILE - A demonstrator throws back a tear gas container after tactical officers try to break up a group of bystanders, Aug. 13, 2014 in West Florissant, Mo. (Robert Cohen/St. Louis Post-Dispatch via AP)

FILE - A protester gestures in front of the burning 3rd Precinct building of the Minneapolis Police Department on May 28, 2020, in Minneapolis. (AP Photo/Julio Cortez, file)

FILE - In this May 28, 2020, file photo, a protester carries a American flag upside down, a sign of distress, next to a burning building in Minneapolis. (AP Photo/Julio Cortez, File)

Lesley McSpadden, left, is comforted by her husband, Louis Head, after her 18-year-old son, Michael Brown was shot and killed by police in the middle of the street in Ferguson, Mo., near St. Louis on Aug. 9, 2014. (Huy Mach/St. Louis Post-Dispatch via AP)

Protesters gather calling for justice for George Floyd on May 26, 2020, in Minneapolis. (Carlos Gonzalez/Star Tribune via AP)