"Search me," Liu says. "But you can be sure we'll get to the bottom of this." She looks at the collected dwarves for a moment, then says, "I need you all to guard the prisoners. Don't torture them, kill them, or otherwise take any kind of revenge on them. Anything you do to them may reduce the chances we get your companions back."
Liu then takes Murt aside, and talks to him in a low voice, so that only he and the party hopefully can hear. "Murt, there's more going on here than just a couple of goblins. We aren't the first group that's been sent down here - one other group was sent before us. Either they were ambushed before they got here, or they cut and run for some reason, but either way this area probably isn't terribly safe right now. It's up to you whether you want to hold put and fortify or clear out for a bit. My guess is you probably are better off sticking together and holding put for now, while we check this out more fully."
Liu then takes Murt aside, and talks to him in a low voice, so that only he and the party hopefully can hear. "Murt, there's more going on here than just a couple of goblins. We aren't the first group that's been sent down here - one other group was sent before us. Either they were ambushed before they got here, or they cut and run for some reason, but either way this area probably isn't terribly safe right now. It's up to you whether you want to hold put and fortify or clear out for a bit. My guess is you probably are better off sticking together and holding put for now, while we check this out more fully."