What you need to know about the Chattanooga shooter

Chattanooga shooter Mohammad Abdulazeez told a friend that ISIS was "stupid group" and it was "doing wrong," the close pal, James Petty, told CNN. Abdulazeez also told him that ISIS "was completely against Islam," he said. Petty added that Abdulazeez taught him how to shoot an AR-15 assault rifle and the two would practice in the woods.