 For the duration of the investigation McNally wore a wire and cultivated the trust of bingo lobbyists and other insiders so they would talk freely in front of him and offer him bribes.Ned McWherter, who was Speaker of the Tennessee House when the investigation began and who was elected Governor of Tennessee in 1986, also was praised by federal officials for cooperating with the investigation.Operation Rocky Top became public in January 1989 when W.D.