Maybe the other guy servant who actually did it. He was the culprit all along and framing ...

Nah. Remember the bad servant got a replacement solution? The other servants just didn't know about it and thought the one they stole was the only one.

His probably the scapegoat. Since they know he couldn't do it they had to have a back up. Why would the other servant keep the solution and not throw it immediately. He also probably have more if he is the real culprit. The other servant probably didn't kill himself, he was set on fire on purpose. HHHmmm I can't wait to find out the truth.. this story is so interesting...