Lavonte Drummer and Dominic Davis, the 18-year-old Oakland residents accused of beating to death 59-year-old Tian Sheng Yu of San Francisco, pleaded not guilty to murder charges on Monday. Yu and his son, 27-year-old Jin Cheng Yu, were attacked on Telegraph Avenue, near the Fox Theater, on April 16 "while they were heading to a pawn shop." The two boys attacked them because, according to police, "their lives weren't going well." The incident highlighted tensions between the Asian and black communities in the Bay Area. [via CBS 5/BCN]