"Are you tracking down some insane killer?"

A seemingly insane killer has struck once again.

Bran, as leader of all werewolves, would be responsible for destroying Gerry's father before he became an insane killer.

A meticulous, intelligent, methodical, cool, and utterly insane serial killer.

During the time, he guns down an insane killer, but is still wracked with remorse.

Each time he takes a pill he turns into a hairy insane killer, who doesn't remember what he's done, except as a vague dream.

They find his references to a "super-powered serial killer" almost insane.

Two years of this duty and they're guaranteed to be insane killers.

He is portrayed as an one-eyed, heavily scarred and clinically insane killer.

Then, more seriously, he points out that insane killers have their own rituals that look religious, but are personal.