(alternatively, if they think that these people have been paid by the orcs, they would have to assume that the orcs still kept some treasure for themselves, and proceed deeper into the dungeon. And then, of course, they would find all those killed orcs and triggered/disabled traps)...
So what do they do now? Confess their crimes, try to make some sort of penance in secret, or just shrug and proceed to spend their spoils?
Any of these responses will tell me something about their characters... which in turn gives me further hooks for role-playing opportunities. Which is part of what role-playing games are supposed to be about.
But what if that throws the DM's story off-track? Dammit, what about my plot? It's almost like you're treating this like just some sort of game.
