Police in Idaho released body-worn and security camera recordings Thursday showing officers fatally shooting a knife-wielding, intellectually disabled teenage boy from the other side of a chain link fence, confirming that they made no effort to de-escalate the situation before opening fire.

Idaho police released body camera video of the moment 17-year-old Victor Perez, an autistic teen who has cerebral palsy, was shot nine times. NBC News' Ryan Chandler has more on the shooting that has left the city of Pocatello stunned.