Colorado high school shooter was 'radicalized by and extremist network,' officials say

Colorado authorities identifying 16-year-old Desmond Holly as a student who opened fire at Evergreen High School using a revolver. Investigators did not say where the shooter got the gun, but said he was radicalized by an extremist network. He tried to find new targets and he he came up against a roadblock on many of those doors.He couldn't get to those kids. They say he continued to reload as he shot out windows and at lockers. Tonight, officials say two students remain in critical condition.Authorities sa ...