The three county employees were shot in the ensuing barrage by a colleague and his wife. The report did not say if any survived, though a federal prosecutor hailed their sacrifice.
"These victims had no chance to protect themselves as a result of the callous perpetration of violence, while others heroically sacrificed themselves in an attempt to stop the shooting," US Attorney Eileen Decker said in a statement.
The report by the Police Foundation, a policy study group, and the Department of Justice provided a detailed account of the pandemonium that unfolded as the Islamic extremists opened fire at a December 2 meeting of the man's colleagues and, minutes later, as police first arrived at the scene of horrific bloodshed.
Syed Rizwan Farook and his wife, Tashfeen Malik, killed 14 people and wounded 22 others in the massacre at a training event and holiday gathering of the San Bernardino County Health Department, where Farook worked as a food inspector.
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The first victims had been shot outside the Inland Regional Center. One appeared to have been eating lunch at a picnic table and the other was found still holding his cellphone, according to the report based on interviews with over 200 witnesses, law enforcement officers and others.
Colleagues inside had heard popping sounds, but many didn't recognize the sound of gunfire until the doors burst open and they saw a man in black start spraying bullets. People ran in horror, some dove to the floor and others fell from the fusillade.
"Probably on the second or third clip, it finally clicked that this wasn't an exercise," the official said. The report does not name witnesses, victims or first responders.
The couple calmly reloaded several times over the course of two to three minutes before they left, and appeared to look for signs victims might still be alive, shooting one or more bullets into those who made a sound or moved.
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