A founding member of the Oath Keepers and band Iced Earth has become the first person to plead guilty.
The gunman killed eight and wounded several others before taking his own life.
Kimberly Potter, who turned in her badge on Tuesday, made her first court appearance.
The gunman took his own life.
Officials have released the footage of police fatally shooting teenager Adam Toledo.
Amazon has been criticized by some of its 800,000 employees for having harsh working conditions.
A 17-year-old student, who opened fire at an Austin-East Magnet High School, was fatally shot on Monday.
"I will invoke my Fifth Amendment privilege today," Chauvin said.
It was done to punish Russia for interfering in last year's US election, cyber-hacking, bullying Ukraine and other alleged "malign" actions.