SF Gun Buy Back Program

Anonymous Gun Buy Back Program In San Francisco

A stack of rifles at a gun buyback program in San Francisco in 2012. (Justin Sullivan/Getty Images)

Anonymous Gun Buy Back Program In San Francisco

A San Francisco police officer documents a rifle that is being surrendered during a gun buy back program on December 15, 2012. (Photo by Justin Sullivan/Getty Images)

Anonymous Gun Buy Back Program In San Francisco

A San Francisco police officer inspects a rifle that is being surrendered during a gun buy back program on December 15, 2012 in San Francisco, California. The San Francisco police department held a one-day gun buy back event that paid $200 per gun turned in. A better than expected crowd resulted in payback money running out and vouchers were issued to collect money within a week. Over 200 guns were collected. (Photo by Justin Sullivan/Getty Images)

Anonymous Gun Buy Back Program In San Francisco

A San Francisco police officer inspects a rifle that is being surrendered during a gun buy back program on December 15, 2012 in San Francisco. (Justin Sullivan/Getty Images)

Anonymous Gun Buy Back Program In San Francisco

A San Francisco police officer documents a gun that is being surrendered during a gun buy back program on December 15, 2012 in San Francisco, California. (Justin Sullivan/Getty Images)

Anonymous Gun Buy Back Program In San Francisco

Bullets and a clip. (Justin Sullivan/Getty Images)

Anonymous Gun Buy Back Program In San Francisco

A San Francisco police officer adds a rifle to a stack of surrendered guns during a gun buy back program on December 15, 2012 in San Francisco, California. (Photo by Justin Sullivan/Getty Images)

Anonymous Gun Buy Back Program In San Francisco

Weapons surrendered during a gun buyback program. (Justin Sullivan/Getty Images)

Anonymous Gun Buy Back Program In San Francisco

Guns sit in a box that were surrendered during a gun buy back program. (Photo by Justin Sullivan/Getty Images)