He removed the storage device and inserted it into his wristwatch, then checked the surveillance footage within his prosthetic eye.
There was nothing wrong with the surveillance footage.
He didn't immediately put the storage device back in place; instead, he reached for a position inside the surveillance circuit, where a tightly stretched silk thread still remained.
If he had put the storage device back in place, that silk thread would have snapped due to contact.
Both silk threads were still taut, and there were no visible flaws in the surveillance footage, from which he concluded in his mind.
Someone had come in.
Both of these silk threads shouldn't have been taut.
The one further inside should have been broken, as the accumulated heat from the long-operating surveillance route would trigger a mechanism at some point, and the twist produced by this hidden mechanism would break the silk thread.
Devil Wind had tested this numerous times; it was bound to happen.
