Has anyone found where the chest is for this key?

Was it not on Vendil? I'm sure it was?

The key is for the chest in the room where you killed him, that's all.

Didn't see it on him, I guess I missed it. He was standing next to a chest but it was unlocked.

That's what I thought too, that chest is unlocked already guess it was just bugged.

It seemed unlocked to me, but I did see a fast flash of print that probably said it was unlocked with the key....probably.

Edit: I know i scoured the place and found no other chests hidden, not even in the water.