I know nothing about Karl Pierson, the Arapahoe High School shooter, other than the brief sketches I have seen in the paper the last few days. I have neither read nor heard about his writings (other than the Latin tag he wrote on his arm). In fact, I do not know if any such writings exist, but I suspect they do. It seems that people like Pierson always want other people, at least the ones they don’t kill, to have the benefit of their erudition.
That said, I am going to go out on a limb and make a prediction. I predict that if he did leave behind writings, those writings will indicate that he was a committed Darwinist. I will predict further that in those writings he will muse about the ethical implications of atheistic materialism and/or Darwinism.
I could be very wrong. It might turn out that he was a fundamentalist young earth creationist, and if that is the case our Darwinist friends will have a field day. But that would surprise me very much indeed.