'We may not be able to stop the guns, but more has to be done to identify potential school shooters. The school knew! He got kicked out of school multiple times, once for packing bullets in his backpack... also he was suspended for bringing knives on campus & last year, for threatening students.' He would regularly set off the fire alarm at school before he was eventually expelled. His social media posts, particularly two separate Instagram accounts, both of which have now been taken offline, when he showed off a small black handgun, and posted threatening comments under YouTube videos in his own name, including: “I whana shoot people with my AR-15.” The police knew, because his adoptive mother, often resorted to calling the police to try to talk some sense into her sons.'