ISIS give Vegas shooter the nom de guerre Abu Abdul Bar al-Amriki as they insist he was a member of their group, despite flat denials from the FBI ISIS continues to claim that Las Vegas shooter Stephen Paddock is linked to their organisation, despite explicit denials from the FBI. Shortly after Sunday's horrific mass shooting where Paddock, 64, a resident of nearby Mesquite, Nevada, killed 59 people and wounded more than 500, ISIS's 'news agency' linked the incident to their organisation.