Did He Know All Along?

Eric who was standing in silence didn’t speak a word since the team arrived. The team who was busy in their work didn’t notice that fact that it was Eric who made the discovery. They should have asked him about that one location in which his metal detector made the loudest beep. Though the team was finding the items from the treasure which were everywhere on the field. It was getting very difficult for the team to search the box which actually held the artifacts when it was buried in the past. You would be surprised to know who hid the treasure?