Shooting at San Francisco UPS facility

San Francisco police prepare to enter a UPS facility where a gunman shot several people, killing three, before taking his own life on June 14.

San Francisco firefighters work in a triage area at the scene of a shooting at a UPS facility in San Francisco.

A police officer rests his head on his hands outside a UPS facility in San Francisco where a gunman shot several people, including himself, on June 14.

UPS workers gather outside the San Francisco facility where a shooting took place on Wednesday in San Francisco.

San Francisco police officers investigate the scene of a shooting at a UPS facility in San Francisco on June 14 after a gunman opened fire on employees at the facility.

A San Francisco police officer stands guard at the scene of a shooting at a UPS facility in San Francisco.

Acting San Francisco Police Chief Toney Chaplin speaks June 14 at a news conference at the scene of a shooting at a UPS facility in San Francisco.

UPS workers sit on a curb outside a package-delivery warehouse where a shooting took place June 14 in San Francisco.