Firearms seized during a sweep by the Los Angeles Police Department using the California's Armed Prohibited Persons System initiative. The program uses a database to identify gun owners who are no longer allowed to possess a firearm. Damian Dovarganes/AP hide caption

itoggle caption Damian Dovarganes/AP

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