As do I, I remember many of the families feeling frustrated that they didn't get the answers they desired and also that they were not allowed to talk about it.
As someone who did not lose a child and doesn't have any... I cannot imagine what the parents of Eric and Dylan could say to help them understand why their children, and their parent were murdered.
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"And you know, you know, you know, this can be beautiful, you say you're numb inside, but I can't agree. So the world's unfair, keep it locked out there. In here it's beautiful."