This case has always been about the actions and inactions of Officer Yanez. In court, Yanez testified that Philando was pulling the firearm out of his pocket, despite being told not to.
"A system that perpetually condones the killing of people, without effect, doesn't need to be revised, it needs to be dismantled!" wrote Kaepernick on Twitter. The officer shot Castile five times after Castile said he was carrying a gun.
The July 6 shooting gained national attention after Diamond Reynolds - Castile's girlfriend, who was in the auto during the shooting - live-streamed the bloody aftermath on Facebook.
Slave patrols were common in southern U.S. states where white men would monitor and enforce discipline on black slaves.
Kaepernick tweeted his support for Castile's family, noting "My heart aches for Philando's family".
Wall St opens higher as tech stocks bounce back
Clovis Oncology soared 47 percent to $87.90 after the biotechnology company's ovarian cancer drug was set for a label expansion. Amazon was up 0.8 percent, while Wal-Mart, Target and Kroger gained between 0.8 percent and 1.8 percent on Monday.
After Friday night protests in St. Paul that ended in 18 arrests on I-94, Castile supporters gathered at Loring Park in Minneapolis at 5 p.m. Saturday.
Ramsey County Attorney John Choi charged Yanez with second degree manslaughter for shooting Castile.
"The system in this country continues to fail black people and will continue to fail us", Valerie Castile, the victim's mother, said after hearing the verdict.
"You call yourself a good cop, but you see one of your colleagues beating somebody", she said.