Shooting suspect Tashfeen Malik passed a DHS counterterrorism screening as part of her vetting for a K-1 fiancee visa last year, but barring any criminal or terrorist background there was little chance DHS would have been able to detect whether she had become radicalized.
Syed Farook, the other half of the terror duo, reportedly got engaged to 27-year-old Pakistani national Malik during a trip overseas in 2014.
Via the Los Angeles Times:
Co-workers recalled Farook telling them that he met his wife online and was making a trip to Saudi Arabia to marry her.
He spent nine days in Saudi Arabia in the summer of 2014, according to the Saudi Embassy in Washington, D.C.
When Farook returned to the U.S. in July 2014, he brought Malik on a so-called fiancee visa, law enforcement officials said. They subsequently married and she was granted a conditional green card last summer.
In order to obtain the green card, the couple “had to prove that their marriage was legitimate, and Ms. Malik had to provide her fingerprints and pass criminal and national security background checks using F.B.I. and Department of Homeland Security databases.”