Nashville shooter bought seven guns legally and was under care for an emotional disorder

Police say the 28-year-old who killed three students and three adults at a Nashville elementary school bought seven guns legally but was under care for an emotional disorder. The Metropolitan Nashville Police Department released the body-camera footage from the two officers who they say fatally shot the attacker. Former FBI Deputy Director Andrew McCabe joins AC360 to discuss how the police officers immediately ran toward the gunfire without any hesitation.