There was this mean-looking AR-15 see that:
- was a loner on anti-psychotic drugs
- was publicly obsessed with other guns and explosives
- would kill squirrels and rabbits and drink their blood
- would capture neighborhood dogs and cats and hang them from trees
- would shoot out the windows of neighbors' garages, sheds and houses
- threatened to kill multiple high school classmates
- many classmates felt it was quite likely it would be a high-school shooter
- was expelled from high school for carrying ammunition to school in its backpack
- police were called to its house 39 times in one year
- posted on Facebook that it was going to stage a high school massacre "professionally"
- the FBI was twice warned that it, by name, was quite likely to kill multiple classmates at school
- finally went to its high school and killed 17 and wounded 15 more classmates
