http://www.washingtontimes.com/news/2015/dec/3/syed-farook-tashfeen-malik-erased-digital-footprin/
San Bernardino killers erased digital presence day before the attacks
The husband and wife who carried out a deadly shooting spree in San Bernardino, California, began erasing their digital footprint a day in advance of the attack deleting email accounts, disposing of hard drives and smashing their cell phones, according to law enforcement sources involved in the investigation.
Officials are still working to determine what motivated Syed Rizwan Farook and his wife Tashfeen Malik to storm a conference room inside the Inland Regional Center as a holiday party was taking place Wednesday and spray the room with bullets.
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Officials involved in the investigation say the couple appeared to have gone to great lengths to conceal their plans a cell phone recovered from Ms. Maliks body was newly purchased and had had been used only recently. Two other cell phones that were recovered had been smashed with a hammer and were expected to be sent to the FBIs forensic lab in Washington for examination.
Authorities also noted that a hard drive and motherboard are missing from a computer found at the Redlands, California, home the couple rented