Who said "There's a darkness in all of us."?

This quote is attributed to Will Graham.

There's a darkness in all of us. - Will Graham

"There's a darkness in all of us."

Will Graham

"I appreciate the way you think. It's like we're having a conversation in my head."

"Murder is intimate. There's no voyeurism in it."

"My mind doesn't stop. It just runs in circles."

"I'm not afraid of what I am. I'm afraid of what I might become."