THE CHAUFFEUR THIEF

-Detective story-

I'm doctor Wilson, top detective. Last week, the police asked me to help them investigate a robbery. 

"Someone has stolen a very expensive diamond from a billionaire's house. We need your help!" 

I took my notebook, went to my car and hurried to the house. I looked for clues and found some crumbs. "Who's in the house?" I asked the billionaire. "My manager, my cook, my waiter, my gardener, my chauffeur and my cleaner," replied the billionaire. I questioned the suspects, then I searched the house. "I know who the robber is!",  I said. "I've found the stolen diamond! It's the chauffeur!".