Career
He was an activist for the American Indian Movement West. He demanded freedom for Leonard Peltier and justice for Alex Nieto who he believed to have been murdered by San Francisco Police Department officers, and an end to discriminatory practices by local businesses. He marched in support of civil rights, Idle Number More, Little Children are Sacred and other causes.
He served a 10-year prison sentence where he became acquainted with his Native American roots.
He grew up in the San Francisco Mission District. Rivera died on August 29, 2015 from brain cancer.