The 86 unionized teachers were getting nowhere in contract negotiations with the school board of CarrolIton, Mich., a blue-collar suburb of Saginaw. Some of the teachers expressed harsh opinions in the junior high school lounge that they used as a caucus room. When board negotiators repeated some of their conversations word for word during the contract talks, they could not believe it was a coincidence.
Two weeks ago, the teachers searched the lounge and found a bugging device hidden behind a heating duct; the wires led directly to the office of School Superintendent Charles Murphy. Two more bugs turned up in...