As he was younger, he had mental issues. The wrong thing his mother did though, was bringing him to the shooting range as a kid and leaving firearms in his possession. When he was old enough to leave the house with a firearm, he drove onto a school campus (This wouldn’t have happened if armed guards were at the front) with three different firearms and opened fire on innocent children and staff members. Children and even full-grown people with mental problems, should not be allowed to own any kind of firearm this resulting in going crazy and taking innocent lives. Having problems isn’t there fault, but owning a gun can be there