Keishon and Kenyata Blake are accused of robbing and stabbing Maria Elena Rivas to death as she walked home from a Ralph's supermarket near Adams Boulevard and Vermont Avenue on Dec. 22, 2014.
Maria Elena Rivas, 62, is is seen in an undated photo (left), and at a Ralph's Monday, Dec. 22, 2014. She was fatally stabbed as she walked in West Adams (right).
Police say the Blake brothers have been linked to multiple assaults and robberies in the South Los Angeles area, including a violent robbery of an elderly woman.
Their arraignment was postponed until September.
