Sounds like exactly what I said would happen. 
Like killing something bigger seems like a fun thing
Geez it's not like I want to kill a person.
"This is where the madness escalated. @Basic_human began to tire of conventional extravagance, searching for bigger and bigger beasts to slay. Once that didn't satiate his bloodlust, he began to target humans. At first, the scum of society, the unwanted and unneeded, cloaking himself in false justice. But soon this too didn't suffice and things took a dark turn."I'm bored killing rats
I swear I'm not!!