You're asking at like the end of S3? It might be good if u tell where u left off so I can tell u; or you can just read his biography on his page on wiki which could contain spoilers if u wish to see it tho
I'm pretty sure he tries to do another school shooting but i don't know cuz I haven't gotten to that part yet. Something about how tyler looks and talks makes me feel so bad for that poor kid. Im just happy he has support.