Cephus "Bobby" Johnson in 2011, when the former transit officer who shot Johnson's nephew, Oscar Grant, was released from jail. Johnson and other family members have seen Fruitvale Station, a new feature film depicting the shooting, multiple times. Jason Redmond/AP hide caption

itoggle caption Jason Redmond/AP

Police descended on Oikos University in Oakland, Calif., Monday after the shootings that left at least seven people dead. Noah Berger/AP hide caption

itoggle caption Noah Berger/AP