Sen. Bernie Sanders Bernie SandersThe Hill's Campaign Report: Trump faces backlash after not committing to peaceful transition of power Bernie Sanders: 'This is an election between Donald Trump and democracy' The Hill's 12:30 Report: Trump stokes fears over November election outcome MORE (I-Vt.) on Saturday critiqued the "profoundly broken" U.S. criminal justice system, following the acquittal of the Minnesota police officer who shot 32-year-old Philando Castile five times at a traffic stop last year

“Our criminal justice system is profoundly broken and has failed African Americans over and over again,” Sanders tweeted Saturday. "We need major reforms including making certain that lethal force is the last response, not the first response."

Our criminal justice system is profoundly broken and has failed African Americans over and over again. https://t.co/0Xca18wQoA — Bernie Sanders (@SenSanders) June 17, 2017

We need major reforms including making certain that lethal force is the last response, not the first response. — Bernie Sanders (@SenSanders) June 17, 2017

We must demand a justice system that values black lives, not one that takes innocent black lives. — Bernie Sanders (@SenSanders) June 17, 2017

Sanders is a vocal advocate of criminal justice reform. Last year Sanders spoke out against Castille’s death, as well as the death of Alton Sterling.

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Police officer Jeronimo Yanez, who was charged with manslaughter, was found not guilty on Friday. Defense attorneys claimed Yanez felt that his life was in danger and shot Castile after he told the officer he was armed.

Prosecutors said Yanez never saw the gun, and had plenty of other options besides shooting Castile.

The video of Castile's death went viral after his girlfriend, Diamond Reynolds, live streamed the aftermath of the shooting on Facebook, seconds after Castile was shot by the officer.