Actually yeah do thisThe Xenos artifact could have some sort of shielding technology that prevents it from being destroyed or something
Scanners do not detect the artifact anymore. It was destroyed along with the planet.
Okay, did any ships come by recently, other than yours?
Does seeing his rotting, lifeless corpse count as in person?
Well, there was the exterminatus fleet with that one other inquisitor...come to think of it, you never saw him in person, did you?
Go meet with this Inquisitor.
Your navigator can detect where they went after they left. Make a warp jump there?
Yes.