The two San Bernardino attackers sought to cover their tracks by damaging some personal electronic devices, a senior U.S. law enforcement official told the Washington Post as investigators struggled to learn what prompted the rampage that claimed at least 14 lives. Since the massacre Wednesday, officials have scrambled to determine whether they were looking at a terrorist attack or an extremely unusual and lethal case of workplace violence. They have also revealed that the attackers had amassed an arsenal of explosives and ammunition, suggesting the possibility of further violence.
Police said they had found a number of items — including thumb drives, computers and cellphones — that were being analyzed to investigate the couple's digital trail. However, the official said Friday that the attackers sought to destroy some of the devices. Some were smashed into little pieces. The FBI is still trying to determine when the devices were smashed and has not concluded if they were damaged before the shooting or during the hours between the massacre and the shootout with police later that same day that killed both attackers, Syed Rizwan Farook, 28, and his wife, Tashfeen Malik, 27. The New York Times reported Friday that Malik had “pledged allegiance” to the Islamic State in a Facebook posting.