He called the incidents the work of "demented, criminally stupid minds."

"The idea could be planted in too many demented minds."

Who would think it anything other than a flight of fancy from a possibly demented mind?

The demented mind of The Curse proves to be his undoing.

(He also engaged in every other offensive behavior his demented mind could imagine.)

Curtis could never have imagined that Alternative 3 was more than something concocted by a demented mind.

He normally rationalizes these with absurd explanations that only make sense in his own demented mind.

What kind of demented mind could give the signal to destroy it?

I could never touch that demented mind of his again!

From the perspective of the smart young woman, viewers come close to the killer's thoughts but are never too attached to his demented mind.