Last year there was a Columbine series on an NPR podcast I believe.. I will look up the name in a bit.
True Crime Garage does a pretty good one if I recall correctly.
Last Podcast on the Left has a LOT of misinformation and relies heavily on Cullens book.
There are quite a few that have interviews with Sue.
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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."