'Gunshot from Roah York's house? Wait, since the time moved backwards for a whole week, this is the moment that Roah York dies!'
Kiernan pulled out his red-hilted knife from his boot and stormed inside the house. He made his way up the stairs and arrived at the office.
There, a close-eyed Roah York looked slumped in his chair, a bullet wound at the side of his head, and a smoking gun in his hand.
No one else was there.
'It is suicide after all?'
Kiernan frowned and then said.
"I guess it is suicide! Quest successful!"
He awkwardly smiled, wondering if that was enough to convince the system that he had found the right answer, but nothing happened.
[…Good try]
'Oh, the system is capable of sarcasm? Interesting, but I guess this isn't suicide. The mission was to find the killer, but if Roah York killed himself, does that make him the killer? I don't know.