"Just you wait, it won't be long.
The man in black will soon be here.
With his cleaver's blade so true.
He'll make mincemeat out of you!"
"Smith was raped and tortured. That's cruelty. I can understand cruelty. Tabram was killed by frenzied and repeated stabbing. That's rage, I understand that, too. This one's more... methodical. Someone near enough did surgery on this woman, I don't understand that at all."
— Inspector Fred Abberline, From Hell.
Sylar: I'm not a serial killer.
Luke: But you've got a pattern. You go after specific victims. You collect mementos.
D.J.: Let me get this straight. Chris left us for dead, and now we're alone while that escaped psycho killer with a chainsaw is on the loose?
Duncan: No! We're alone while that escaped psycho killer with a chainsaw and a hook is on the lose!!
"You know what flavor of killer takes trophies, don't you? Serial. Souvenirs help them differentiate between the victims."
— Sherlock Holmes, Elementary