There's no real way back that you can find, so you continue on down the main passageway a bit, where you come to another room right as the passage turns south(ish). Inside the room is a stench so bad you could be forgiven for believing it was some magical spell, but it's not. It's a dead trog. He looks to have been stabbed to death judging from his wounds, and long enough ago that moss is starting to cover the body, but...
He's holding something, clutching it tight like he was trying to hide it when he was killed. It's hard to tell what it is from the doorway, but it's going to be hard to walk over to investigate too.
OOC:
Whoever wants to investigate, give me a CON save. You'll make it in and out either way, but that's some strong stench, and there might be some side effects.