Little Johnny&#39;s kindergarten class was on a field trip to their local police station where they saw pictures, tacked to a bulletin board, of the 10 most wanted criminals. One of the youngsters pointed to a picture and asked if it really was the photo of a wanted person. &quot;Yes,&quot; said the policeman. &quot;The detectives want very badly to capture him.&quot; Little Johnny asked, &quot;Why didn&#39;t you keep him when you took his picture?&quot;