FBI investigates deadly Dallas ICE facility shooting as targeted attack; gunman dead
Chaos and confusion in Dallas.
A gunman takes aim at an ICE facility in Dallas before taking his own life.
We're learning what was written on a shell casing left behind.
The FBI says those messages make it clear: this was a targeted attack against ICE.
Federal investigators are on scene, combing for clues.
CBS News reporter Marvin Hurst reports.