Civil rights leaders and activists held a rally in Minneapolis on Sunday, called "One Year, What's Changed?" to commemorate the first anniversary of George Floyd's death.
"It has been very frustrating for me and my family - for your life to change within a blink of an eye. I still don't know why," his emotional sister, Bridgett Floyd, told the crowd.
They then marched through the streets demanding police reform.
In a confrontation captured on video on May 25, 2020, former police officer Derek Chauvin pushed his knee into Floyd's neck for more than nine minutes as he and the three other officers arrested the 46-year-old Black man. Floyd, who was in handcuffs, had been accused of using a fake $20 bill to buy cigarettes at a grocery store.
Floyd's death sparked a summer of nationwide protests over policing and systemic racism.
Last month, a jury found Chauvin guilty of second and third-degree murder and manslaughter after hearing three weeks of testimony in a highly publicized trial.
Reverend Al Sharpton called for a just sentence.
"Don't give us a conviction and not give him the time he deserves," he told rally-goers.
Chauvin is scheduled to be sentenced on June 25.