Ah. Yes when we were looking for someone we tried to retrace their steps, where we knew they were last just like you. We also tried questioning those who might have seen him and tried to piece together his final moments...

[He pets Gyōkō quietly.] But we were helped slightly because the person we were looking for was well known, so people had reason to have noticed him.

[Not that it had gotten them very far... At first at least.]