AdvertisementA Mass Shooter 'Pledges Allegiance' To ISIS. What Does This Mean?June 13, 2016Greg MyrefacebookEmailTashfeen Malik (left) pledged allegiance to the Islamic State on Facebook just before she and her husband, Syed Farook, went on a shooting spree that left 14 dead in San Bernardino, Calif., last December. The couple is shown here in a 2014 photo. In just over a year, three separate attackers have declared support for ISIS as they carried out shootings in the U.S. (AP)