Population pressure and the stress of modern life may cause an increase in violent tendencies.
The urban environment is the incubator for all sorts of undesirable behaviors.
However, much his atrocities disgust us, he may actually consider himself a hero.
This is common among those who are referred to by the popular slang, "going postal".
In his tortured mind, he may feel he was battling against impossible odds.
It is not unusual for some individuals to belive that the entire fate of the world rest with them.
In the end, our subject displays all the classic symptoms of a paronoid delusional.
We may never know what exactly set him off but, rest assured, we will have plenty of time to study him.