Too late

The plane was late and detectives were waiting at the airport all morning. They were expecting a valuable parcel of diamonds from south Africa. A few hours earlier, someone had told the police that thieves would try to steal the diamonds. When the plane arrived, some of the detective waiting inside the main building while other were waiting on the airfield. Two man took the e and carried it into the Customs hparcel off the plan ouse.While two detectives were keeping guard at the door , two other opened the parcel. To their surprise, the precious parcel was full of stones and sand!