LITTLETON, Colo. -- We know your children's safety is the top priority when you send them to school.
And now, the demand for answers is growing following last year's deadly shooting at Arapahoe High School.
An activist is speaking out and criticizing the investigation.
Parents are expressing frustration that they are no closer to understanding what happened or how to prevent it than they were two months ago when senior Claire Davis was shot and killed inside the school.
There are claims the school administration had been warned about the shooter before this ever happened.
One parent worries that if it's true, could there be more students in the school who could be a danger?
Boris Sanchez has more information in his video report.