Doesn't make Harry suspicious

"There," came Marcone's voice after a moment. "We're speaking privately."
"Why didn't you tell me?" I said.
"Tell you that I hadn't sent Mister Franklin for you?"
"Yeah."
"Would you have believed me?"
"No."
"Would you have thought I was playing some kind of game with you?"
"Yes."
"Then why waste the time and make you more suspicious? Generally speaking, you are quite perceptive-given enough time. And I know you well enough to know that I do not wish to have you as my enemy."
I glowered at him.
He arched an eyebrow, meeting my gaze without fear or hostility.
"Why do you want the Shroud?"
"That's none of your business."
I scowled. "Actually it is. Literally. Why do you want it?"
"Why do you?"
"Because the Denarians are going to kill a lot of people with it."
Marcone shrugged. "That's reason enough for me as well."
"Sure it is."
"It's simple business, Mister Dresden. I can't conduct business with a mound of corpses."
"Why don't I believe you?"
Marcone's teeth flashed. "Because given enough time, you are a perceptive individual."


Death Masks Chapter 32, page 286