About Jaylen, is it possible that since he was such a "star" in his family and tribe he never learned how to deal with failure or disappointment? Then when something didn't go his way in high school he got angry and lashed out? Also even though he learned traditions, the greater American culture is still out there. I think a lot of these school shootings now have a "copy cat" element to them. Some kid gets pissed off and it's something that comes to their mind since it happens so often.
On a side note, why don't all schools have metal detectors and security by now??
Bookmarks