On the FBI's radar: Shooter had been investigated before

President Barack Obama, center, speaks to members of the media in the Oval Office of the White House in Washington, Monday, June 13, 2016, after getting briefed on the investigation of a shooting at a nightclub in Orlando by FBI Director James Comey, right, Homeland Security Secretary Jeh Johnson, left, and Vice President Joe Biden. (AP Photo/Pablo Martinez Monsivais)