A three thousand year old ship appears out of a violent storm and there is one survivor.
You don't know who or what caused the storm.
You don't know how the storm was generated.
You don't know why the storm was generated.
You do know that knowledge the survivor possesses might change history.
You do know you cannot prevent the formation of other storms.
You do know you cannot prevent people from your time being taken by similar storms.
You are the Government. What do you do?