Discord is a free interactive fiction novel with a mystery theme and a lot of plot twists.
These three are a hardened bunch. No matter how you’ve hammered them independently, they haven’t caved.
But then Second Detective Leftenant Gustav Schmidt got the bright idea: put ’em together and see if some sparks fly.
So far, no luck, though. You need to ask them some more specific questions. Perhaps you should discuss the stolen items–the mask, the banana, and the tea.