Gun used in deadly Oregon school shooting was gift from shooter's mom, sources say

The 16-year-old shooter who killed three children and a teacher at Silver Rail Elementary School in Bend, Oregon, used a gun that was a birthday gift from his mother, sources say. CBS News senior crime reporter Anna Schecter has more.

The 16-year-old shooter who killed three children and a teacher at Silver Rail Elementary School in Bend, Oregon, used a gun that was a birthday gift from his mother, sources say. CBS News senior crime reporter Anna Schecter has more.