Investigators pore over Las Vegas attack evidence

Marilou Danley, girlfriend of the Las Vegas gunman, was questioned by the FBI. More

Marilou Danley, girlfriend of the Las Vegas gunman, was questioned by the FBI on Wednesday after flying back from the Philippines where she had been during the attack. Meanwhile, President Trump and the first lady met with survivors, doctors, police and emergency crews. Investigators also learned more about how the gunman acquired his arsenal. Special correspondent Cat Wise reports.

AIR DATE 10/4/17